LAPD Reopens Case of Suspected Cop-Killer's Firing

The Los Angeles Police Department announced today it will reopen the case of the firing of Christopher Dorner, but said the decision was not made to "appease" the fugitive former cop suspected of killing three people.

Dorner, a fired and disgruntled former Los Angeles police officer, said in the so-called "manifesto" he released that he was targeting LAPD officials and their families and will keep killing until the truth is known about his case.

"I have no doubt that the law enforcement community will bring to an end the reign of terror perpetrated on our region by Christopher Jordan Dorner and he will be held accountable for his evil actions," LAPD Chief Charlie Beck said in a statement released tonight.

He spoke of the "tremendous strides" the LAPD has made in regaining public trust after numerous scandals, but added: "I am aware of the ghosts of the LAPD's past and one of my biggest concerns is that they will be resurrected by Dorner's allegations of racism within the Department."

To do that, he said, full re-investigation of the case that led to Dorner's firing is necessary.

"I feel we need to also publicly address Dorner's allegations regarding his termination of employment, and to do so I have directed our Professionals Standards Bureau and my Special Assistant for Constitutional Policing to completely review the Dorner complaint of 2007; To include a re-examination of all evidence and a re-interview of witnesses," he said. "We will also investigate any allegations made in his manifesto which were not included in his original complaint.

Irvine Police Department/AP Photo

Christopher Dorner Search: Officials Search for Ex-officer in the Mountains Watch Video

Hundreds of Officers on Hunt for Alleged Cop Killer Watch Video

"I do this not to appease a murderer. I do it to reassure the public that their police department is transparent and fair in all the things we do."

PHOTOS: Former LAPD Officer Suspected in Shootings

As police searched for Dorner today in the San Bernardino Mountains, sources told ABC News that investigators found two AR-15 assault rifles in the burned-out truck Dorner abandoned.

The truck had a broken axle, which may be the reason he decided to set fire to it, the police sources said.

A man identifying himself as Dorner taunted the father of Monica Quan four days after the former LAPD officer allegedly killed her and just 11 hours after he allegedly killed a police officer in Riverside, Calif., according to court documents obtained by ABC News

A man claiming to be Dorner called Randall Quan and told him that that he "should have done a better job of protecting his daughter," according to the documents.

In his 6,000-word "manifesto," Dorner named Randal Quan, a retired LAPD captain and attorney who represented him before a police review board that led to Dorner's dismissal from the force.

"I never had an opportunity to have a family of my own, I'm terminating yours," Dorner wrote, and directed Quan and other officials to "[l]ook your wives/husbands and surviving children directly in the face and tell them the truth as to why your children are dead."

Monica Quan and her fiancé Keith Lawrence were gunned down last Sunday in their car in the parking of their Irvine, Calif., condominium complex. Both were struck with multiple gunshot wounds.

The call, according to court records, was traced to Vancouver, Wash., but law enforcement officials do not believe Dorner was there at the time at the call.

Dorner is believed to have made the call early Thursday afternoon, less than half a day after he is suspected of killing a police officer and wounding two others early that morning, sparking an unprecedented man hunt involving more than a thousand police officers and federal agents spanning hundreds of miles.

FULL COVERAGE: Christopher Jordan Dorner

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Data-wiping algorithm cleans your cellphone

Paul Marks, chief technology correspondent

Mailing your cellphone to a recycling company might make you a few pounds, but it can leave you at risk of identity theft. The deletion techniques recycling companies use are meant for hard discs, and so don't work on the solid-state flash memory used in mobile phones. That means personal data like banking info, texts, contacts and pictures can end up in the hands of, well, anyone the phone ends up with.  

To remedy the problem, British company BlackBelt Smartphone Defence of Skelmersdale, Lancashire claims to have developed a software algorithm that can securely delete data on cellphone memory chips. The trouble with data in a flash memory chip is that it is protected by an on-chip protection algorithm called the wear leveller. This hard-coded routine does its best to ensure the chip's lifetime is maximised so that each memory cell's ability to store charge is not worn out.

"The problem is that the wear-levelling algorithm ends up working
against the data wiping technique used for hard drives, which tries to
overwrite all the data,"
says the company's Ken Garner.

What the firm has done is write their own algorithm, called BlackBelt DataWipe, that works with,
rather than against, the leveller routine to render data
irrecoverable. "It is like having a shredder for personally identifiable
data," says Garner.

However, they don't yet know if their method is proof against sophisticated, nation-state level attacks - which might use electron microscopes
to read the last vestiges of the zeros and ones on a memory chip. "I imagine
if you're GCHQ you'll probably have technology that could get around
this and recover it in some way," says Garner.

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Nursing is a profession, not a job just anybody can do: doctor

SINGAPORE: Singapore's Director of Medical Services in the Ministry of Health has paid tribute to the role of nurses in Singapore's healthcare system.

Writing on the Health Ministry's Facebook page, Professor K Satkunanantham said he had to write the post as a doctor and as the Director of Medical Services, because of the events that unfolded over the last couple of days.

He stressed that nursing is not a job that just anybody can do - it is a profession.

Prof Satku explained that it takes a special kind of person to be a nurse - someone who is compassionate, caring, and who is willing to put the interests of others above their own.

He said nurses are often specially trained, and need to keep up with new developments in their field.

They work in difficult situations, and have to remain professional in the face of challenges.

As a surgeon, Prof Satku said he has worked with very highly-trained nurses, without whom much of his work would have been impossible.

In the operating theatre, nurses ensure that the most complex operations are carried out smoothly.

In the wards, nurses work to ensure the well-being of patients and continue to do so long after everyone else has gone home.

Prof Satku said nurses are often under-appreciated and taken for granted.

He said Singapore's healthcare system would not function without nurses as hospitals, clinics and hospices rely on them.

Prof Satku thanked all those in the nursing profession.

On Friday, on the concluding day of the debate on the White Paper, Deputy Prime Minister Teo Chee Hean issued a corrigendum to the document in Parliament in relation to footnote 12 on page 40 of the White Paper.

The footnote included two sentences - "Certain low-skilled jobs like personal services, retail, and nursing are hard to offshore. They will still be needed even as the economy upgrades".

Mr Teo said this segment will be deleted.

Mr Teo said this classification of low-skilled jobs is not correct and apologised to those whose professions have been unintentionally misrepresented.

Mr Teo said he personally has the greatest respect for the nursing profession. He said it is a noble and caring profession that all depend on and appreciate.

Mr Teo said the matter was brought to his attention by friends in the nursing profession and unions.

- CNA/xq

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Apple and the iWatch conundrum

Will Apple ever make an iWatch?

(Credit:
Sarah Tew/CNET)

Ever since the sixth-generation iPod Nano, lots of people have thought that Apple making its own branded watch is not merely a smart potential move but simply a matter of time. No matter what some have recently argued, I doubt, however, that today's Apple is hungry enough to create the fabled iWatch device.

I've been covering the technology beat long enough to feel, no, smell certain shifts in the gadget market. I'm talking about those cycles when a new product category springs up from nowhere and first seems like a completely goofy notion. Soon after, the segment really heats up with scores of companies jumping into the fray to make a quick buck.

Traditionally, if Apple senses a legitimate opportunity it steps in at the right moment after figuring out the secret to success and sucks the air right out of the market.
Tablets and MP3 players existed well before Apple launched the
iPod and iPad, but their arrival completely transformed the playing field. Remember music players from Creative Labs, Rio, or even Microsoft's clunky Windows Tablet PCs?

I'm getting the same tingling sensation right now from smartwatches. At
CES in January the sleeper hit of the show was wearable tech, essentially devices you could strap or clip to yourself as you would an accessory or article of clothing. A lot of smartwatches, fitness bands, or some hybrid of the two, were talked up at the conference.

These included everything from the long-awaited and crowd-funded Pebble and the Dick Tracy/007-inspired Martian Passport Watch to the Fitbit Flex fitness tracker and the Basis Band. When you factor in the success of the Nike FuelBand, Nike being a company Apple has partnered with in the past to create fitness products, I'd say the time is ripe for Apple to swoop in for the kill.

Chat through the Martian Passport like a speakerphone.

(Credit:
Brian Bennett/CNET)

This is a move the Cupertino company used to accomplish without breaking a sweat. Apple has the knack of catching the competition completely flat-footed, surprising since many already had a big head start. The iPhone is a perfect example. Smartphones had existed for years but the iPhone sounded the death knell for Microsoft's struggling Windows Mobile products -- trust me, I was saddled with a T-Mobile Wing at the time. The Sidekick and a legion of keyboarded feature phones suffered the same fate.

I'm afraid Apple hasn't demonstrated its signature ferocity in recent years. We haven't seen a truly disruptive product from the company since the first iPad. Every noteworthy hardware release since then has been evolutionary and incremental, not transformative. The iPad Mini is simply a smaller iPad, while the iPhone 5 essentially increased the screen from 3.7 to 4 inches. Its A6 processor is also dual-core where many Android CPUs have gone to full quad-core and it received 4G LTE well after its rivals.

What Apple needs here is true out-of-the-box action to quell the doubters at large and on Wall Street. A serious example of nonlinear thinking that matches the creation of the iPod, iPhone, and iPad. Something that would merge multiple gadgets and applications into something entirely new or perhaps clean up the confused mess other manufacturers tout as useful gadgets. Something like a fabulous, shiny Apple iWatch.

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Space Pictures This Week: Sun Dragon, Celestial Seagull

• 
  
  
  
  
  
  
  

  Solar Dragon

  Image courtesy SDO/NASA

  Resembling a dragon's tail, remnants of a solar filament strain to escape the sun's gravity in an image released this week by NASA's Solar Dynamics Observatory.

  Most of the electrically charged gas, imaged in extreme ultraviolet light, was unsuccessful in its escape attempt and fell back into the sun.

  Filaments form when magnetic field lines push out of the sun in loops, holding dense gas above the surface of the sun. (Read about a huge solar filament that erupted in August 2012.)

  —Jane J. Lee and Christine Dell'Amore

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Aurora On The Road

  Photograph by Marcel Mivelaz, My Shot

  Northern lights writhe behind a thin cloud layer above a road on Ringvassoya Island, Norway, in this picture submitted to National Geographic's My Shot photography community on January 31.

  Born of violent eruptions of plasma from the sun's surface, auroras occur when the ejected gas slams into the protective bubble of Earth's magnetic field. (Watch a video about the birth of auroras.)

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Celestial Seagull

  Image courtesy ESO

  Like a parrot perched on a pirate's arm, the Seagull Nebula resides in one of the spiral arms of the Milky Way.

  This new image, released by the European Southern Observatory on February 6, shows a closeup of one of the "wings" of the Seagull Nebula. Red clouds of hydrogen gas glow from the intense ultraviolet radiation given off with the birth of stars.

  The entire nebula is actually comprised of three large gas clouds arranged in the shape of a bird. (See pictures of other nebulae.)

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Saturn's North Pole

  Image courtesy Caltech/SSI/NASA

  Saturn's hexagon-shaped north pole is lit by the sun now that spring has come to the planet's northern hemisphere, as seen in a NASA picture released this week.

  The 15,000-mile-wide (25,000-kilometer-wide) cloud formation, captured by the Cassini spacecraft's wide-angle camera in November, was initially spied during the Voyager missions in the 1980s. (See another Cassini picture of the hexagon.)

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Martian Avalanches

  Image courtesy U. Arizona/NASA

  A 2011 frost avalanche kicks up dust on Mars in a picture released this week by Mars Reconnaissance Orbiter's HiRISE camera team.

  Frost avalanches usually occur at the onset of the Martian spring, when layers of carbon dioxide frost warm, causing ice and dust to cascade off of cliffs.

  "While HiRISE has captured other frost avalanches before, they never cease to amaze, since it demonstrates that there are indeed active processes on the red planet," according to the HiRISE website. (Related: "First Mars Avalanches Seen In Action.")

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Luminous London

  Photograph courtesy NASA

  London gleams in a nighttime picture taken from the International Space Station on February 2.

  Expedition 34 Flight Engineer Chris Hadfield captured the English city while flying about 240 miles (400 kilometers) above Earth.

  Published February 8, 2013

  
  











• 
  
  
  
  
  
  
  

  Illustration courtesy Foster and Partners/ESA

  Published February 8, 2013

  
  

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Great Energy Challenge Blog

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Northeast Shuts Down as Blizzard Batters Millions

A blizzard of possibly historic proportions battered the Northeast Friday into Saturday, and forecasters feared as much as two feet of snow and strong winds could shut down densely populated cities such as New York and Boston, where cars were ordered off the streets.

State officials declared states of emergencies throughout the region, and utilities estimated more than a half-million customers were without power by late Friday night.

Some wondered if the storm could top Boston's all-time single-storm snowfall record of 27.6 inches, set in 2003.

By 9 p.m. Friday, according to the National Weather Service, the storm was spinning off the coast of Long Island, N.Y., and expected to move north-northeastward past New England's coast before its effects tapered off on Saturday afternoon.

"Storm total snowfall accumulations of 1 to 2 feet ... with locally higher amounts are possible across much of the Northeast," the National Weather Service said. "The heaviest snow is forecast to fall across parts of eastern Massachusetts ... Connecticut and Rhode Island where snowfall amounts higher than two feet are possible. In addition to the heavy snowfall ... wind gusts as high as 70 mph are possible ... especially near the coasts."

By 9 p.m. Friday, parts of Connecticut and New York had the highest actual snowfall totals listed by the National Weather Service, with 13 inches measured in Ogdensburg and East Setaukey, N.Y., and Lisbon and North Branford, Conn.

Peak wind gusts included a 71-mph measurement in Buzzards Bay, Mass., the National Weather Service said.

Power outages also were reported across the region. As of 11 p.m. Friday, for instance, approximately 300,000 Massachusetts customers were without power, ABC News station WCVB reported. Utilities also reported approximately 170,000 without power in Rhode Island, 30,000 in Connecticut and nearly 20,000 in New York.

The blizzard conditions came together after a storm from the west joined forces with one from the south to form a nor'easter.

Hurricane Sandy Victims Hit Again, Survivors Prepare for Worst Watch Video

Weather Forecast: Blizzard Headed for Northeast Watch Video

The storm showed the potential for such ferocity that, before it even hit with full force, Massachusetts Gov. Deval Patrick declared a state of emergency Friday afternoon and signed an executive order banning vehicular traffic on roads in his state effective at 4 p.m. ET. It was believed that the last time the state enacted such a ban was during the blizzard of 1978. Violating the ban could result in a penalty of up to a year in jail and a $500 fine.

"[It] could definitely be a historic winter storm for the Northeast," said Adrienne Leptich of the National Weather Service in Upton, N.Y. "We're looking at very strong wind and heavy snow and we're also looking for some coastal flooding."

Airlines began shutting down operations Friday afternoon at major airports in the New York area as well as in Boston, Portland, Maine, Providence, R.I., and other Northeastern airports. By early evening Friday, more than 4,300 flights had been cancelled on Friday and Saturday, according to FlightAware. Airlines hoped to resume flights by Saturday afternoon, though normal schedules were not expected until Sunday.

The snow fell heavily Friday afternoon in New York City. Mayor Michael Bloomberg said clearing the roads was his main concern, and the city readied 1,700 snow plows and 250,000 tons of salt to clear the streets.

New York City was expecting up to 14 inches of snow, which started falling early this morning, though the heaviest amounts were expected to fall at night and into Saturday. Wind gusts of 55 mph were expected in New York City.

"Stay off the city streets. Stay out of your cars and stay at home while the worst of the storm is on us," Bloomberg said Friday.

Connecticut Gov. Dannel P. Malloy declared a state of emergency, deploying National Guard troops across the state to assist in rescues and other emergencies. Schools and state courthouses were closed, and all flights after 1:30 p.m. at Bradley Airport, north of Hartford, Conn., were cancelled. The state's largest utility companies planned for the possibility that 30 percent of customers -- more than 400,000 homes and businesses -- would lose power.

Malloy also directed drivers to stay off the state's major highways.

"Please stay off of 95, 91, 84, Merritt Parkway and any other limited-access road in the state," he said Friday evening.

PHOTOS: Northeast Braces for Snowstorm

Boston, Providence, R.I., Hartford, Conn., and other New England cities canceled school today.

"Stay off the streets of our city. Basically, stay home," Boston Mayor Tom Menino warned Thursday.

On Friday, Menino applauded the public's response.

"I'm very pleased with the compliance with the snow emergency," he said. "You drive down some of the roadways, you don't see one car."

Friday evening, Gov. Patrick also applauded the public's cooperation with the statewide vehicle ban, noting the clear roads were helping utility crews get their work done.

"It's been a great, great help and I thank everyone," Patrick said. "I know it's been an imposition."

As of 4:30 p.m. Friday, according to the Department of Defense, 837 National Guard soldiers and airmen under state control had been activated in Connecticut, Massachusetts and New York in anticipation of the storm -- 552 in Massachusetts, 235 in Connecticut and 50 in New York. The extra hands were helping with roadways, transportation, making wellness checks on residents and other emergency services.

Beach erosion and coastal flooding was possible from New Jersey to Long Island, N.Y., and into New England coastal areas. It was feared some waves off the coast could reach more than 20 feet.

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Robot inquisition keeps witnesses on the right track

MEMORY is a strange thing. Just using the verb "smash" in a question about a car crash instead of "bump" or "hit" causes witnesses to remember higher speeds and more serious damage. Known as the misinformation effect, it is a serious problem for police trying to gather accurate accounts of a potential crime. There's a way around it, however: get a robot to ask the questions.

Cindy Bethel at Mississippi State University in Starkville and her team showed 100 "witnesses" a slide show in which a man steals money and a calculator from a drawer, under the pretext of fixing a chair. The witnesses were then split into four groups and asked about what they had seen, either by a person or by a small NAO robot, controlled in a Wizard of Oz set-up by an unseen human.

Two groups - one with a human and one a robot interviewer - were asked identical questions that introduced false information about the crime, mentioning objects that were not in the scene, then asking about them later. When posed by humans, the questions caused the witnesses' recall accuracy to drop by 40 per cent - compared with those that did not receive misinformation - as they remembered objects that were never there. But misinformation presented by the NAO robot didn't have an effect.

"It was a very big surprise," says Bethel. "They just were not affected by what the robot was saying. The scripts were identical. We even told the human interviewers to be as robotic as possible." The results will be presented at the Human-Robot Interaction conference in Tokyo next month.

Bilge Mutlu, director of the Human-Computer Interaction Laboratory at the University of Wisconsin-Madison, suggests that robots may avoid triggering the misinformation effect simply because we are not familiar with them and so do not pick up on behavioural cues, which we do with people. "We have good, strong mental models of humans, but we don't have good models of robots," he says.

The misinformation effect doesn't only effect adults; children are particularly susceptible, explains the psychologist on the project, Deborah Eakin. Bethel's ultimate goal is to use robots to help gather testimony from children, who tend to pick up on cues contained in questions. "It's a huge problem," Bethel says.

At the Starkville Police Department, a 10-minute drive from the university, officers want to use such a robotic interviewer to gather more reliable evidence from witnesses. The police work hard to avoid triggering the misinformation effect, says officer Mark Ballard, but even an investigator with the best intentions can let biases slip into the questions they ask a witness.

Children must usually be taken to a certified forensic child psychologist to be interviewed, something which can be difficult if the interviewer works in another jurisdiction. "You might eliminate that if you've got a robot that's certified for forensics investigations, and it's tough to argue that the robot brings any memories or theories with it from its background," says Ballard.

The study is "very interesting, very intriguing", says Selma Sabanovic, a roboticist at Indiana University. She is interested to see what happens as Bethel repeats the experiment with different robot shapes and sizes. She also poses a slightly darker question: "How would you design a robot to elicit the kind of information you want?"

This article appeared in print under the headline "The robot inquisition"

It's all about how you say it

When providing new information, rather than helping people recall events (see main story), a robot's rhetoric and body language can make a big difference to how well it gets its message across.

Bilge Mutlu of the University of Wisconsin-Madison had two robots compete to guide humans through a virtual city. He found that the robot which used rhetorical language drew more people to follow it. For example, the robot saying "this zoo will teach you about different parts of the world" did less well than one saying "visiting this zoo feels like travelling the world, without buying a plane ticket". The work will be presented at the Human-Robot Interaction conference in Tokyo next month.

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Part of Circle Line to close on 17 March, shuttle service to be provided

SINGAPORE: The stretch between the Mountbatten and Dakota stations on the Circle Line (CCL) will not be operational on Sunday 17 March, from 5.30am to 10am.

This is to allow engineers to continue doing cable replacement works.

The Land Transport Authority (LTA) and SMRT said train services between Mountbatten and Paya Lebar stations will run as a shuttle service during that period.

During the shuttle service, normal service trains will stop at either Mountbatten or Paya Lebar station.

Commuters continuing their journey on the CCL will need to alight at one of these two stations and board the shuttle train at the opposite platform.

Commuters can then get off at the other station and continue their journey on the normal service train.

LTA and SMRT said the cable replacement at all 30 CCL stations is expected to be completed by December 2013, about half a year earlier than the 18-month timeline previously announced.

Works are currently ongoing for the first phase covering CCL stations from Dhoby Ghaut to Esplanade.

This will be followed by stations from Mountbatten to Tai Seng, Promenade to Stadium, Bartley to Marymount, Caldecott to one-north and Kent Ridge to HarbourFront.

The last phase will involve cables along Marina Bay and Bayfront.

- CNA/xq

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iPhone 5S, 5-inch iPhone 6 allegedly spotted at supplier

Will the iPhone 5S look like the iPhone 5?

(Credit:
CNET)

The much-rumored iPhone 5S and a 5-inch iPhone 6 have shown up at an Apple supplier in China, according to a post on a Chinese microblogging site.

The models could be released this year, according to a post by a Sina Tech user called Old Yao. He reports that a friend of his at a supplier has seen the models and says that the
iPhone 5S resembles the
iPhone 5, while the iPhone 6 is wider, longer, and thinner.

CNET has contacted Apple for comment and will update this report when we learn more.

As Apple gets closer to an anticipated launch of a new smartphone, the speculation and rumor mill go into overdrive, so while Old Yao's comments are food for thought, they should also be consumed with perhaps more than a grain of salt.

Earlier analyst speculation held that Apple would release an iPhone 5S and a revamped version of the iPhone 5 in June or July. KGI Securities analyst Ming-Chi Kuo predicted last month that the new S model would resemble the current model with a few improvements, including an A7 chip for faster performance and a fingerprint sensor.

A larger screen size for an iPhone 6 might attract consumers smitten with Samsung's 4.8-inch Galaxy S3 and 5.5-inch
Galaxy Note 2.

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Asteroid to Make Closest Flyby in History

Talk about too close for comfort. In a rare cosmic encounter, an asteroid will barnstorm Earth next week, missing our planet by a mere 17,200 miles (27,700 kilometers).

Designated 2012 DA14, the space rock is approximately 150 feet (45 meters) across, and astronomers are certain it will zip harmlessly past our planet on February 15—but not before making history. It will pass within the orbits of many communications satellites, making it the closest flyby on record. (Read about one of the largest asteroids to fly by Earth.)

"This is indeed a remarkably close approach for an asteroid this size," said Paul Chodas, a research scientist at NASA's Jet Propulsion Laboratory Near Earth Object (NEO) program office in Pasadena, California.

"We estimate that an asteroid of this size passes this close to the Earth only once every few decades."

The giant rock—half a football field wide—was first spotted by observers at the La Sagra Observatory in southern Spain a year ago, soon after it had just finished making a much more distant pass of the Earth at 2.6 million miles (4.3 million kilometers) away.

This time around however, on February15 at 2:24 pm EST, the asteroid will be passing uncomfortably close—ten times closer than the orbit of the moon—flying over the eastern Indian Ocean near Sumatra (map). (Watch: "Moon 101.")

Future Impact?

Chodas and his team have been keeping a close eye on the cosmic intruder, and orbital calculations of its trajectory show that there is no chance for impact.

But the researchers have not yet ruled out future chances of a collision. This is because asteroids of this size are too faint to be detected until they come quite close to the Earth, said Chodas.

"There is still a tiny chance that it might hit us on some future passage by the Earth; for example there is [a] 1-in-200,000 chance that it could hit us in the year 2080," he said.

"But even that tiny chance will probably go away within the week, as the asteroid's orbit gets tracked with greater and greater accuracy and we can eliminate that possibility."

Earth collision with an object of this size is expected to occur every 1,200 years on average, said Donald Yeomans, NEO program manager, at a NASA news conference this week.

DA14 has been getting closer and closer to Earth for quite a while—but this is the asteroid's closest approach in the past hundred years. And it probably won't get this close again for at least another century, added Yeomans.

While no Earth impact is possible next week, DA14 will pass 5,000 miles inside the ring of orbiting geosynchronous weather and communications satellites; so all eyes are watching the space rock's exact trajectory. (Learn about the history of satellites.)

"It's highly unlikely they will be threatened, but NASA is working with satellite providers, making them aware of the asteroid's pass," said Yeomans.

Packing a Punch

Experts say an impact from an object this size would have the explosive power of a few megatons of TNT, causing localized destruction—similar to what occurred in Siberia in 1908.

In what's known as the "Tunguska event," an asteroid is thought to have created an airburst explosion which flattened about 750 square miles (1,200 square kilometers) of a remote forested region in what is now northern Russia (map).

In comparison, an impact from an asteroid with a diameter of about half a mile (one kilometer) could temporarily change global climate and kill millions of people if it hit a populated area.

Timothy Spahr, director of the Minor Planet Center at Cambridge, Massachusetts, said that while small objects like DA14 could hit Earth once a millennia or so, the largest and most destructive impacts have already been catalogued.

"Objects of the size that caused the extinction of the dinosaurs have all been discovered," said Spahr. (Learn about what really happened to the dinosaurs.)

A survey of nearly 9,500 near-Earth objects half a mile (one kilometer) in diameter is nearly complete. Asteroid hunters expect to complete nearly half of a survey of asteroids several hundred feet in diameter in the coming years.

"With the existing assets we have, discovering asteroids rapidly and routinely, I continue to expect the world to be safe from impacts in the future," added Spahr.

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