Pictures: The Story Behind Sun Dogs, Penitent Ice, and More

Photograph by Art Wolfe, Getty Images

If you want the beauty of winter without having to brave the bone-chilling temperatures blasting much of the United States this week, snuggle into a soft blanket, grab a warm beverage, and curl up with some of these natural frozen wonders.

Nieve penitente, or penitent snow, are collections of spires that resemble robed monks—or penitents. They are flattened columns of snow wider at the base than at the tip and can range in height from 3 to 20 feet (1 to 6 meters). The picture above shows the phenomenon in central Chile. (See pictures of the patterns in snow and ice.)

Nieve penitente tend to form in shallow valleys where the snow is deep and the sun doesn't shine at too steep an angle, said Kenneth Libbrecht, a physicist at the California Institute of Technology in Pasadena who studies ice crystal formation.

As the snow melts, dirt gets mixed in with the runoff and collects in little pools here and there, he said. Since the dirt is darker in color than the surrounding snow, the dirty areas melt faster "and you end up digging these pits," explained Libbrecht.

"They tend to form at high altitude," he said. But other than that, no one really knows the exact conditions that are needed to form penitent snow.

"They're fairly strong," Libbrecht said. "People have found [the spires] difficult to hike through."

—Jane J. Lee

Published January 25, 2013

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Cops Using More Private Cameras to Nab Suspects

Philadelphia detectives were able to quickly make an arrest in the murder and burning of a female pediatrician by viewing surveillance video of nearby stores and a hospital that captured the suspect entering the doctor's home and later getting into his truck.

In the hours after Dr. Melissa Ketunuti's body was found strangled and burning in her basement, city's Homicide Task Force collected surveillance footage from a coffee shop, drug store and hospital overlooking Ketunuti's block. It was footage taken from Ori Feibush's coffee shop that allowed cops to identify Smith.

The suspect, an exterminator named Jason Smith, soon confessed to detectives, police said.

Lately a range of crimes have been solved by the seemingly ubiquitous security videos maintained by private companies or citizens, and investigators have been able to quickly apprehend suspects by obtaining the video, deftly turning private cameras into effective police resources.

Philadelphia Police Arrest Suspect in Doctor's Killing Watch Video

Pa. Doctor Killing: Person of Interest in Custody Watch Video

Private surveillance cameras have become so pervasive that the face of a suspect who allegedly shot a Bronx, N.Y., cab driver in a botched robbery on Jan. 14 was splashed throughout the media within days because the cabbie had rigged his vehicle with a camera.

The New York Police Department arrested Salvatore Perrone after he was caught on surveillance video recorded near two of three shopkeeper slayings in Brooklyn, N.Y., in November. He has since been charged with murder.

And in Mesa, Ariz., surveillance footage taken in November by resident Mitch Drum showed a man rolling on the ground trying to extinguish flames that had engulfed his shirt, which had caught fire while he was allegedly siphoning gas from a car by Drum's house. The man was arrested.

Though surveillance cameras have been a staple of security since a network of government operated cameras dubbed the "ring of steel" was introduced in London in the early 1990s, police have recently launched programs to partner with more businesses.

In Philadelphia, police have launched a program for businesses to register private cameras with the department. According to the SafeCam website, businesses will only be contacted when there is a criminal incident in the vicinity of the security camera. At that point, police will request a copy of the footage for their investigation.

"Businesses are saying, 'I have a camera at this location, and it may or may not be of use to you. It's a registration to say, 'feel free to call me,'" Sgt. Joseph Green told ABCNews.com

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Court says Obama exceeded authority in making appointments

President Obama exceeded his constitutional authority by making appointments when the Senate was on a break last year, a federal appeals court ruled Friday. The court’s broad ruling would sharply limit the power that presidents throughout history have used to make recess appointments in the face of Senate opposition and inaction.

A unanimous three-judge panel of the U.S. Court of Appeals for the District of Columbia Circuit flatly rejected the Obama administration’s rationale for appointing three members of the National Labor Relations Board (NLRB) while the Senate was on a holiday break.

Chief Judge David B. Sentelle sharply criticized the administration’s interpretation of when recess appointments may be made, saying it would give the president “free rein to appoint his desired nominees at any time he pleases, whether that time be a weekend, lunch, or even when the Senate is in session and he is merely displeased with its inaction.” He added, “This cannot be the law.”

The issue seems certain to end up before the Supreme Court, which ultimately could clarify a president’s authority to fill his administration and appoint federal judges when a minority of the Senate blocks consideration of his choices.

Although recess appointments have been made throughout the nation’s history, they have been more commonly made by modern presidents who face partisan opposition that has made it hard for nominees to even receive a vote in the Senate.

Additionally, Friday’s decision casts doubt on hundreds of decisions the NLRB has made in the past year, ranging from enforcement of collective-bargaining agreements to rulings on the rights of workers to use social media.

The ruling also raises questions about the recess appointment of former Ohio attorney general Richard Cordray to head the fledgling Consumer Financial Protection Bureau and about the actions taken by the agency during his tenure, including major new rules governing the mortgage industry. Obama named Cordray at the same time as the NLRB nominees, and his appointment is the subject of a separate lawsuit in D.C. federal court.

The White House criticized the court ruling. “The decision is novel and unprecedented, and it contradicts 150 years of practice by Democratic and Republican administrations,” White House press secretary Jay Carney told reporters Friday. “We respectfully but strongly disagree with the ruling.”

Presidents from both parties have made hundreds of recess appointments when the Senate has failed to act on nominations. Ronald Reagan holds the record with 243. Obama’s predecessor, George W. Bush, made 105, and it was during his term that Senate Democrats began holding pro-forma sessions, some lasting less than a minute, when the Senate went on break. They contended that that kept the Senate in session and did not allow Bush to make recess appointments.

Republicans took up the practice when Obama was elected. But Obama decided to challenge it in January 2012, when the Senate was on a 20-day holiday but holding pro-forma sessions every three business days to block presidential action.

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French-led troops in Mali seize airport at Islamist bastion

BAMAKO: French-led troops Saturday seized the airport and a key bridge serving the Islamist stronghold of Gao in a major boost to a 16-day-old offensive to rout Al Qaeda-linked rebels from Mali's sprawling desert north.

The stunning advance came as the extremist Muslim group controlling Gao since June said it was ready for talks to free a 61-year-old French hostage kidnapped in November.

In a parallel movement, Chadian troops deployed in Mali's eastern neighbour Niger started rolling towards the border to join a contingent of Niger soldiers as part of African efforts to boost the French-led offensive.

"They are a very big contingent and they have tanks and four-wheel drives with machineguns," a Niger security source said.

It was not clear whether they were set to cross the border, which lies only 100 kilometres (60 miles) from Gao.

France on Saturday confirmed the capture of the airport and the Wanbary bridge at Gao but said fighting was continuing in Gao itself.

The airport is located about six kilometres east of Gao, while the bridge lies at the southern entrance to the town, held by the Al Qaeda-linked Movement for Oneness and Jihad in West Africa (MUJAO).

Sources said earlier that the Islamists had left Gao in the wake of the French-led military offensive on January 11 to stop a triad of Al Qaeda-linked groups from pushing southward from their northern bastions towards Bamako.

An alliance of Tuareg rebels who wanted to declare an independent homeland in the north and hardline Islamist groups seized the northern towns of Gao, Timbuktu and Kidal in April last year.

The Islamist groups include MUJAO, Ansar Dine, a homegrown Islamist group, and Al-Qaeda in the Maghreb, of which MUJAO is an offshoot.

The Islamists then sidelined the Tuaregs to implement their own Islamic agenda. Their harsh interpretation of sharia law has seen transgressors flogged, stoned and executed, and they have forbidden music and television and forced women to wear veils.

The MUJAO said it was ready for negotiations to release Gilberto Rodriguez Leal, a French national of Portuguese origin who was kidnapped in western Mali.

"The MUJAO is ready to negotiate the release of Gilberto," said spokesman Walid Abu Sarhaoui. "We Muslims can come to an understanding on the issue of war," he added, without elaborating.

West African defence chiefs meanwhile met to review the slow deployment of regional forces to bolster the French-led offensive against Islamists at an emergency meeting in Ivory Coast's main city Abidjan.

Although the Economic Community of West African States (ECOWAS) regional bloc has pledged more than 4,500 soldiers, their deployment has been delayed by financing and logistical problems.

Chad, which neighbours Mali and is not an ECOWAS member, has promised a total of 2,000 additional troops. They were sent to Niger to join 500 local troops to open a new front against the Islamists.

The Abidjan talks will determine exactly how many troops each country in the 15-nation bloc is willing to pledge but "particularly commit to deploying troops as quickly as possible," said Ivory Coast Defence Minister Paul Koffi Koffi.

The African Union said it would urge members to bolster the African force and seek support from the United Nations for the operation in the form of transport, medicine and field hospitals.

While a fraction of the African forces have arrived in Bamako and are slowly deploying elsewhere, the French and Malian forces have done all the fighting so far.

France has already deployed 2,300 troops to Mali and defence officials acknowledge the force will exceed the initially set upper limit of 2,500.

On Friday, the French and Malian forces captured Hombori, another northern town, in their advance on Gao.

To the centre, French-led forces who on Monday had recaptured the town of Diabaly were pushing northeast towards the town of Lere with the aim of taking control of Timbuktu, still further north.

Aid agencies have expressed increasing concern about the growing food crisis for civilians in the vast semi-arid north of Mali and the drought-stricken Sahel as a whole.

France has asked several Western countries and others to provide logistical support such as planes to allow aerial refuelling, sources close to Defence Minister Jean-Yves Le Drian said.

- AFP/al

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North Korea threatens war with South over U.N. sanctions

SEOUL (Reuters) - North Korea threatened to attack rival South Korea if Seoul joined a new round of tightened U.N. sanctions, as Washington unveiled more of its own economic restrictions following Pyongyang's rocket launch last month.

In a third straight day of fiery rhetoric, the North directed its verbal onslaught at its neighbor on Friday, saying: "'Sanctions' mean a war and a declaration of war against us."

The reclusive North has this week declared a boycott of all dialogue aimed at ending its nuclear program and vowed to conduct more rocket and nuclear tests after the U.N. Security Council censured it for a December long-range missile launch.

"If the puppet group of traitors takes a direct part in the U.N. 'sanctions,' the DPRK will take strong physical counter-measures against it," the North's Committee for the Peaceful Reunification of Korea said, referring to the South.

The committee is the North's front for dealings with the South. DPRK is short for the North's official name, the Democratic People's Republic of Korea.

The U.N. Security Council unanimously condemned North Korea's December rocket launch on Tuesday and expanded existing U.N. sanctions.

On Thursday, the United States slapped economic sanctions on two North Korean bank officials and a Hong Kong trading company that it accused of supporting Pyongyang's proliferation of weapons of mass destruction.

The company, Leader (Hong Kong) International Trading Ltd, was separately blacklisted by the United Nations on Wednesday.

Seoul has said it will look at whether there are any further sanctions that it can implement alongside the United States, but said the focus for now is to follow Security Council resolutions.

The resolution said the council "deplores the violations" by North Korea of its previous resolutions, which banned Pyongyang from conducting further ballistic missile and nuclear tests and from importing materials and technology for those programs. It does not impose new sanctions on Pyongyang.

The United States had wanted to punish North Korea for the rocket launch with a Security Council resolution that imposed entirely new sanctions against Pyongyang, but Beijing rejected that option. China agreed to U.N. sanctions against Pyongyang after North Korea's 2006 and 2009 nuclear tests.

NUCLEAR TEST WORRY

North Korea's rhetoric this week amounted to some of the angriest outbursts against the outside world coming under the leadership of Kim Jong-un, who took over after the death of his father Kim Jong-il in late 2011.

On Thursday, the North said it would carry out further rocket launches and a nuclear test, directing its ire at the United States, a country it called its "sworn enemy".

U.S. Defense Secretary Leon Panetta said the comments were worrying.

"We are very concerned with North Korea's continuing provocative behavior," he said at a Pentagon news conference.

"We are fully prepared ... to deal with any kind of provocation from the North Koreans. But I hope in the end that they determine that it is better to make a choice to become part of the international family."

North Korea is not believed to have the technology to deliver a nuclear warhead capable of hitting the continental United States, although its December launch showed it had the capacity to deliver a rocket that could travel 10,000 km (6,200 miles), potentially putting San Francisco in range, according to an intelligence assessment by South Korea.

South Korea and others who have been closely observing activities at the North's known nuclear test grounds believe Pyongyang is technically ready to go ahead with its third atomic test and awaiting the political decision of its leader.

The North's committee also declared on Friday that a landmark agreement it signed with the South in 1992 on eliminating nuclear weapons from the Korean peninsula was invalid, repeating its long-standing accusation that Seoul was colluding with Washington.

The foreign ministry of China, the North's sole remaining major diplomatic and economic benefactor, repeated its call for calm on the Korean peninsula at its daily briefing on Friday.

"The current situation on the Korea peninsula is complicated and sensitive," spokesman Hong Lei said.

"We hope all relevant parties can see the big picture, maintain calm and restraint, further maintain contact and dialogue, and improve relations, while not taking actions to further complicate and escalate the situation," Hong said.

But unusually prickly comments in Chinese state media on Friday hinted at Beijing's exasperation.

"It seems that North Korea does not appreciate China's efforts," said the Global Times in an editorial, a sister publication of the official People's Daily.

"Just let North Korea be 'angry' ... China hopes for a stable peninsula, but it's not the end of the world if there's trouble there. This should be the baseline of China's position."

(Additional reporting by Michael Martina in Beijing; editing by Jeremy Laurence and Raju Gopalakrishnan)

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Deformed Dolphin Accepted Into New Family

In 2011, behavioral ecologists Alexander Wilson and Jens Krause of the Leibniz-Institute of Freshwater Ecology and Inland Fisheries in Germany were surprised to discover that a group of sperm whales (Physeter macrocephalus)—animals not usually known for forging bonds with other species—had taken in an adult bottlenose dolphin (Tursiops truncatus).

The researchers observed the group in the ocean surrounding the Azores (map)—about 1,000 miles (1,600 kilometers) off the coast of Lisbon, Portugal—for eight days as the dolphin traveled, foraged, and played with both the adult whales and their calves. When the dolphin rubbed its body against the whales, they would sometimes return the gesture.

Among terrestrial animals, cross-species interactions are not uncommon. These mostly temporary alliances are forged for foraging benefits and protection against predators, said Wilson.

They could also be satisfying a desire for the company of other animals, added marine biologist John Francis, vice president for research, conservation, and exploration at the National Geographic Society (the Society owns National Geographic News).

Photographs of dogs nursing tiger cubs, stories of a signing gorilla adopting a pet cat, and videos of a leopard caring for a baby baboon have long circulated the Web and caught national attention.

A Rare Alliance

And although dolphins are known for being sociable animals, Wilson called the alliance between sperm whale and bottlenose dolphin rare, as it has never, to his knowledge, been witnessed before.

This association may have started with something called bow riding, a common behavior among dolphins during which they ride the pressure waves generated by the bow of a ship or, in this case, whales, suggested Francis.

"Hanging around slower creatures to catch a ride might have been the first advantage [of such behavior]," he said, adding that this may have also started out as simply a playful encounter.

Wilson suggested that the dolphin's peculiar spinal shape made it more likely to initiate an interaction with the large and slow-moving whales. "Perhaps it could not keep up with or was picked on by other members of its dolphin group," he said in an email.

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But the "million-dollar question," as Wilson puts it, is why the whales accepted the lone dolphin. Among several theories presented in an upcoming paper in Aquatic Mammals describing the scientists' observations, they propose that the dolphin may have been regarded as nonthreatening and that it was accepted by default because of the way adult sperm whales "babysit" their calves.

Sperm whales alternate their dives between group members, always leaving one adult near the surface to watch the juveniles. "What is likely is that the presence of the calves—which cannot dive very deep or for very long—allowed the dolphin to maintain contact with the group," Wilson said.

Wilson doesn't believe the dolphin approached the sperm whales for help in protecting itself from predators, since there aren't many dolphin predators in the waters surrounding the Azores.

But Francis was not so quick to discount the idea. "I don't buy that there is no predator in the lifelong experience of the whales and dolphins frequenting the Azores," he said.

He suggested that it could be just as possible that the sperm whales accepted the dolphin for added protection against their own predators, like the killer whale (Orcinus orca), while traveling. "They see killer whales off the Azores, and while they may not be around regularly, it does not take a lot of encounters to make [other] whales defensive," he said.

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Alleged Doctor Killer Had Anger Issues, Friend Says

Jason Smith, the Philadelphia exterminator who police say showed up at the home of Dr. Melissa Ketunuti this week to solve her rodent problem before strangling her, was a problem child as an adolescent, a family friend told ABC News.

The family friend from many years ago, who asked for anonymity, said Smith, 36, had behavior and anger issues, and that he also liked to set things on fire.

After Smith and Ketunuti got into "some kind of argument" in Ketunuti's basement, he struck her, strangled her and set her on fire, according to police.

Smith reportedly admitted to the brutal slaying after hours of police questioning Wednesday night.
Smith told police that Ketunuti had "belittled" him, sources told ABC News affiliate WPVI-TV in Philadelphia

He snapped and apparently tried to hide any evidence by setting the 35-year-old doctor on fire with paper he lit in the kitchen, the station reported.

Philadelphia Police Department/AP Photo

Pa. Doctor Killing: Person of Interest in Custody Watch Video

Philadelphia Doctor's Murder Leaves Police Baffled Watch Video

"People like Mr. Smith basically walk around with a huge chip on their shoulder, and they feel so inadequate and so insecure that any perceived belittlement of them will set them off," ABC News consultant and former FBI agent Brad Garrett said.

Capt. James Clark of the Philadelphia Police Department said Smith's mood and clarity varied during his alleged confession.

"At some points, he was solemn. At other points, it was like he was in a fog," Clark said at a news conference.

Smith has been charged with murder, arson, abuse of a corpse and risking a catastrophe.

Ori Feibush, who owns a coffee shop near Ketunuti's street, said he and police pored over hours of surveillance video until they saw Ketunuti walking home from doing errands, with Smith steps behind her.

"Forty-five minutes later, we see this same guy walking past, but [he] looks a little more disheveled and he's got gloves on," Feibush told ABC News.

Police say that after the slaying, Smith circled Ketunuti's block twice, before heading off to another job.

Ketunuti was a doctor at the Children's Hospital of Philadelphia and had lived alone in the Graduate Hospital neighborhood of the city for about three years. Her family released a statement saying they are "devastated by this senseless act of violence."

"Melissa's friends from childhood, college, residency and elsewhere remember her many kindnesses, even during long hours, as well as her zest for life: traveling, running and spending time with friends and family," the statement said. "Melissa was a source of joy to everyone in her life. Her passing has left an enormous gap in our lives."

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