Al Qaeda-linked militants free 2 Filipino hostages

MANILA, Philippines Abu Sayyaf gunmen have freed two Filipino members of a Jordanian TV journalist's crew believed to have been kidnapped by the al Qaeda-linked militants in June as they set out to interview the extremists in their jungle lairs in the southern Philippines, police said Sunday.

Policemen found frail-looking cameraman Ramel Vela and audio technician Roland Letriro late Saturday and brought them to a hospital in southern Sulu province, where they were kidnapped in June along with Jordanian Baker Abdulla Atyani, provincial police chief Senior Superintendent Antonio Freyra said. Atyani is believed to still be held by the gunmen.

"They really lost weight because they were constantly under stress each day," Freyra told The Associated Press.

It was not immediately clear who worked for their release or whether ransom was paid to the kidnappers.

Military officials have said Abu Sayyaf militants have demanded 130 million pesos ($3.1 million) for the release of Atyani and his two Filipino crew members. Hundreds of rebels of the Moro National Liberation Front, which signed a 1996 autonomy deal with the government, have also been negotiating with the Abu Sayyaf for the release of Atyani and other foreign hostages, including two European bird watchers who were abducted last February.

Moro commander Khabir Malik said his group had taken the initiative to seek the freedom of the hostages to help the government clean up the image of Sulu, a predominantly Muslim province where the Abu Sayyaf has carried out deadly bombings, kidnappings for ransom and beheadings, primarily in the early 2000s.

U.S.-backed military offensives have crippled the Abu Sayyaf in recent years, but it remains a national security threat. Washington has listed the Abu Sayyaf as a terrorist organization.

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Body of Missing Mom Reportedly Found in Turkey

The body of an American woman who went missing while on a solo trip to Turkey has been pulled from a bay in Istanbul, and nine people have been held for questioning, according to local media.

Sarai Sierra, 33, was last heard from on Jan. 21, the day she was due to board a flight home to New York City.

The state-run Andolu Agency reported that residents found a woman's body today near the ruins of some ancient city walls in a low-income district, and police identified the body as Sierra.

Rep. Michael Grimm, R-NY, who with his staff had been assisting the Sierra family in the search, said he was "deeply saddened" to hear the news of her death.

"I urge Turkish officials to move quickly to identify whomever is responsible for her tragic death and ensure that any guilty parties are punished to the fullest extent of the law," he said in a statement.

Courtesy Sarai Sierra's family

Footage Shows Missing New York Mom in Turkish Mall Watch Video

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The New York City mother, who has two young boys, traveled to Turkey alone on Jan. 7 after a friend had to cancel. Sierra, who is an avid photographer with a popular Instagram stream, planned to document her dream vacation with her camera.

"It was her first time outside of the United States, and every day while she was there she pretty much kept in contact with us, letting us know what she was up to, where she was going, whether it be through texting or whether it be through video chat, she was touching base with us," Steven Sierra told ABC News before he departed for Istanbul last Sunday to aid in the search.

Steven Sierra has been in the country, meeting with U.S. officials and local authorities, as they searched for his wife.

On Friday, Turkish authorities detained a man who had spoken with Sierra online before her disappearance. The identity of the man and the details of his arrest were not disclosed, The Associated Press reported.

The family said it is completely out of character for the happily married mother, who met her husband in church youth group, to disappear.

She took two side trips, to Amsterdam and Munich, before returning to Turkey, but kept in contact with her family the entire time, a family friend told ABC News.

Further investigation revealed she had left her passport, clothes, phone chargers and medical cards in her room at a hostel in Beyoglu, Turkey.

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Astrophile: A scorched world with snow black and smoky

Astrophile is our weekly column on curious cosmic objects, from the solar system to the far reaches of the multiverse

Object: Titanium oxide snow
Location: The hot-Jupiter planet HD 209458b

There is something magical about waking up to discover it has snowed during the night. But there's no powdery white blanket when it snows on exoplanet HD 209458b. Snow there is black, smoky and hot as hell – resembling a forest fire more than a winter wonderland. Put it this way: you won't be needing mittens.

HD 209458b belongs to a family called hot Jupiters, gas-giant planets that are constantly being roasted due to their closeness to their sun. By contrast, the gas giants in our immediate neighbourhood, including Jupiter, are frigid, lying at the solar system's far reaches.

HD 209458b is also noteworthy because it is tidally locked, so one side is permanently facing towards its star while the other is in perpetual night. On the face of it, these conditions wouldn't seem to invite snow: temperatures on the day side come close to 2000° C, while the night side is comparatively chilly at around 500° C.

Snow made of water is, of course, impossible on this scorched world, but the drastic temperature differential sets up atmospheric currents that swirl material from the day side to night and vice versa. That means that any substances with the right combination of properties might be gaseous on the day side and then condense into a solid on the night side, and fall as precipitation. Say hello to titanium oxide snow.

Stuck on the surface

Although oxides of titanium make up only a small component of a hot Jupiter's atmosphere, these compounds have the right properties to fall as snow. But there was a snag that could have put a stop to any blizzards. Older computer models of hot Jupiters suggested that titanium oxides condensing in the air on the night side would snow – and remain on the relatively cool surface forever. "Imagine on Earth if you had no mechanism to evaporate water, it would never rain," says Vivien Parmentier of the Côte d'Azur Observatory in Nice, France.

Now he and colleagues have created a more detailed 3D computer model that shows that the snow can become a gas again as it falls and the temperature and pressure increase. Strong updraughts can then blow the titanium oxides back to the upper atmosphere. "The gas can come back on the top layers and snow again and again," says Parmentier.

Snowfall on HD 209458b would be like none you've ever seen. Though titanium dioxide is white and shiny, for example, the snowflakes would also contain silica oxides from the atmosphere, making them black. Since the atmosphere is also dark, snowstorms on the planet would be a smoky affair, the opposite of the white-outs we get on Earth. "It would be like being in the middle of a forest fire," says Parmentier.

Although the team studied a particular hot Jupiter, their model should apply equally to other planets of this type, suggesting hot snow is a common occurrence. Parmentier says we may have already spotted snow clouds on another hot Jupiter, HD 189733b, as spectral analysis of the planet suggests the presence of microscopic particles in its atmosphere.

David Sing of the University of Exeter, UK, who helped identify such particles on HD 189733b, says the team's new model goes a long way to explaining how titanium oxides behave on hot Jupiters. "We're pretty used to water condensing on Earth; there it is titanium because the temperatures are so much hotter."

Hot, black snow – now that would be something to wake up to.

Reference: http://arxiv.org/abs/1301.4522

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Twitter hit by "sophisticated" cyber attack

SAN FRANCISCO: Twitter said Friday it had been hit by a "sophisticated" cyber attack similar to those that recently hit major Western news outlets, and that the passwords of about 250,000 users were stolen.

"This attack was not the work of amateurs, and we do not believe it was an isolated incident," Twitter information security director Bob Lord said in a blog post.

Lord referred to an "uptick in large-scale security attacks aimed at US technology and media companies" as he told of Twitter detecting attempts this week to get unauthorized access to data in the firm's network.

The attack coincided with the revelation of several high-profile security breaches. The New York Times and The Wall Street Journal said this week that they had been hacked, and pointed to hackers from China.

Twitter did not confirm the source of the intrusion.

But Lord noted that "the attackers were extremely sophisticated, and we believe other companies and organizations have also been recently similarly attacked."

He said that Twitter shut down a live attack as it was in process.

However, Lord added, cyber attackers may have gotten usernames, email addresses, passwords and other data.

As a precaution, Twitter invalidated passwords of accounts at issue and sent people email messages telling them to create new passwords.

-AFP/ac

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Attorney: Slain prosecutor brought gun to work

By Michael Martinez and Mariano Castillo, CNN

updated 9:01 PM EST, Fri February 1, 2013

STORY HIGHLIGHTS

• Slain Texas prosecutor began carrying a gun to work daily, friend says


• Mark Hasse used a different courthouse exit every day, the attorney tells CNN


• Prosecutor didn't explain why he was fearful, she says


• Sheriff's chief deputy says he hadn't heard of fears and the gun carrying

(CNN) -- The Texas prosecutor shot to death in broad daylight outside a courthouse had feared for his life and carried a gun to work, according to a Dallas attorney describing herself as his friend.

Colleen A. Dunbar told CNN that she spoke with Kaufman County Assistant District Attorney Mark Hasse on January 24, and he told her he began carrying a gun in and out of the county courthouse on a daily basis.

Hasse was gunned down in the parking lot while going to work Thursday. Investigators on Friday were reviewing his caseload for possible clues about what led to his killing.

"He told me he would use a different exit every day because he was fearful for his life," Dunbar told CNN.

Assistant District Attorney Mark Hasse was one of 13 prosecuting attorneys in Kaufman County.

She said that Hasse offered no specifics on why he felt threatened, but only that he did. Dunbar said she was "shocked" by the killing.

When told of Dunbar's statements, Chief Deputy Rodney Evans of the Kaufman County Sheriff's Department was unaware of the information.

"But," Evans told CNN, "we've got 50 people here taking phone calls so somebody may know something I don't."

There were no significant advances in the case, Kaufman Police Chief Chris Aulbaugh said Friday, but that doesn't mean investigators weren't busy.

"We've fielded numerous tips coming in from the public. We are following up on every one of them," he said.

Police say they believe one or two people committed the crime, but there are few descriptive details because they hid their faces. Police are looking for a gray or silver older model sedan in relation to the case, Aulbaugh said.

Hasse was shot several times after "a very small, very short confrontation," police said.

Investigators are looking into whether Hasse's killing was retribution for any of the prosecutions he led. Hasse was one of 13 prosecuting attorneys in Kaufman County, each of whom handled between 380 and 390 cases.

Authorities hope that an ever-growing reward for information will reveal more leads.

Donors in the area have raised $64,500 to be used as reward money, and the police chief has asked for more donations.

The Texas Rangers, the FBI and agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives have joined the manhunt.

CNN's David Fitzpatrick contributed to this report.

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Egypt protesters, police clash at presidential palace

CAIRO Protesters denouncing Egypt's Islamist president hurled stones and firebombs through the gates of his palace gates on Friday, clashing with security forces who fired tear gas and water cannons, as more than a week of political violence came to Mohammed Morsi's symbolic doorstep for the first time.

The streets outside the presidential palace were a scene of mayhem for hours into the night.

Security forces pumped volley after volley of tear gas, set fire to protester tents and at one point dragged a protester to the ground, stripped him and beat him. Protesters burned tires and hurled stones and fireworks. A 23-year-old died when he was shot in the chest and forehead, the Health Ministry said.

The march on the palace, where Morsi was not present, was part of a wave of demonstrations in cities around the country called by opposition politicians, trying to wrest concessions from Morsi after around 60 people were killed in protests, clashes and riots.

But many of the protesters go further, saying he must be removed from office, accusing his Muslim Brotherhood of monopolizing power and failing to deal with the country's mounting woes. Many have been further angered by Morsi's praise of the security forces after the high death toll, which is widely blamed on excessive use of force by the police.

The day's unrest, however, risked boosting attempts by the government and Brotherhood to taint the opposition as violent and destructive -- a tack Morsi supporters have taken for weeks.

In a statement issued amid the clashes, Morsi accused protesters of trying to break ito the palace and said "political fores involved in incitement" are responsible for the violence. He called on all factions to condemn the violence and said security forces would "act decisively to protect state institutions."

A day earlier, the top opposition figures met with the Brotherhood for the first time and agreed on a joint promise to avoid violence. That drew sharp criticism from many anti-Morsi activists who said the politicians had played into the Brotherhood's hands and given legitimacy to any crackdown.

The fighting started when a crowd of several thousand marched to the palace in an upscale district of the capital, chanting, "the people want the fall of the regime," and "leave, leave, Morsi." Security forces allowed them to reach close to the main gate, and some protesters hurled shoes and stones through the fence into the grounds. Some climbed on the fence, apparently to better throw stones, but it did not appear they were breaking in.

At first, police and Republican Guards inside did not respond. But when several firebombs were thrown over the fence, the security forces unleashed water cannons, then tear gas, then riot police descended on the streets outside the palace.

Hours of clashes ensued, with streams of tear gas and stones flying through the air as security forces pushed the protesters back. A particularly heavy volley of dozens of tear gas canisters over a few minutes scattered much of the crowd, fleeing into side streets as riot police pursued and the sound of birdshot being fired echoed. Associated Press footage showed police stripping one protester on the ground and kicking him before dragging him into a van.

The Interior Ministry, in charge of police, later said in a statement that it would investigate the incident, calling it "regrettable and unacceptable."

More than 50 people were hurt during demonstrations around the country, the Health Ministry said.

The turmoil was the first significant violence at the presidential palace in the eight-day wave of protests -- though the site was the scene of clashes in November between anti-Morsi protesters and Islamists that left around 10 people dead. But other protests around the country on Friday did not see significant violence.

1/2

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Hillary Clinton Says Goodbye...Until 2016?

Feb 1, 2013 6:48pm

Image Credit: Manuel Balce Ceneta/AP Photo

After four years, nearly a million miles traveled and 112 countries visited, Hillary Clinton stepped down as the 67th secretary of state on Friday. But even on this, her final day as America’s top diplomat, she could not escape the questions about what she’ll do four years from now.

Many of the 1,000 employees who gathered to see her off expressed hope that this was not the end of her political career.

“2016! 2016!” the crowd chanted as   Clinton waved and drove away. “We’ll Miss You!”

Right before her departure, Clinton gave the traditional farewell speech to staff on the steps of the State Department’s historic C street lobby. In a roughly 10 minute, often reflective speech she called the 70,000 State Department employees part of “a huge extended family.”

“I cannot fully express how grateful I am to those with whom I have spent many hours here in Washington, around the world and in airplanes,” she said, drawing laughter from the audience.

Clinton’s trademark sense of humor was on display, even as she grew emotional  speaking about how much the State Department had  meant to her over the last four years.

PHOTOS: Hillary Clinton Through the Years

“I am very proud to have been secretary of state. I will miss you. I will probably be dialing ops just to talk,” she joked to a cheering and laughing crowd. “I will wonder what you all are doing, because I know that because of your efforts day after day, we are making a real difference.”

But  Clinton also was somber when discussing the danger diplomats and foreign service officers face all over the world, using Thursday’s suicide bombing attack against the U.S. Embassy in Ankara, Turkey, in which a Turkish guard was killed, as an example.

“We live in very complex and even dangerous times, as we saw again just today at our embassy in Ankara, where we were attacked and lost one of our foreign service nationals, and others injured,” said Clinton “But I spoke with the ambassador and the team there. I spoke with my Turkish counterpart. And I told them how much we valued their commitment and their sacrifice.”

Clinton was flanked by trusted deputies, Bill Burns and Tom Nides, whom she gave warm hugs to at the end of the speech. With a huge “Thank You” sign behind her she walked a rope line after finishing her speech, greeting the hordes of employees who wanted to shake her hand and say goodbye before she walked out of the State Department as secretary of state for the last time.

“It’s been quite a challenging week saying goodbye to so many people and knowing that I will not have the opportunity to continue being part of this amazing team,” Clinton said. “But I am so grateful that we’ve had a chance to contribute in each of our ways to making our country and our world stronger, safer, fairer and better.”

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Swarm-mongering: Brainless blobs flock together

Birds of a feather flock together and now so do brainless, inanimate blobs. Made of microscopic particles, the artificial swarms could shed light on the mysterious mechanisms behind the natural swarming seen in fish and birds. They might also lead to materials with novel properties like self-healing.

Animals such as birds, fish and even humans that move together in swarms have individual intelligence, but Jérémie Palacci of New York University and colleagues wondered whether inanimate objects could also swarm. "From a physicist's point of view, if many different systems behave in the same way there must be an underlying physical rule," he says.

To explore this idea, the team created microscopic plastic spheres, each one with a cubic patch of haematite, an iron oxide, on its surface. When submerged in hydrogen peroxide, the spheres spread out in a disordered fashion. The team then shone blue light on the particles, causing the haematite cubes to catalyse the breakdown of any nearby hydrogen peroxide into water and oxygen. As hydrogen peroxide concentration dropped temporarily in these regions due to the reaction, osmotic forces cause more hydrogen peroxide to flow into them, and that in turn buffets the spheres. The whole process then repeats.

Self-healing swarm

When two spheres come close enough to each other, the balance of chemical forces shifts so that the two spheres are attracted. If there are enough spheres in the same place they will cluster together to form shapes of symmetrically arranged particles, which the team call crystals (see video, above). These crystals continue to be buffeted by the movement caused by the breakdown of hydrogen peroxide – but now they move together as one object, replicating a life-like swarm. Switch off the light, however, and the reaction stops, causing the crystal to lose the forces that hold it together, and the particle distribution becomes disordered once again.

"This system shows that even though the particles have no social interaction or intelligence, you can exhibit collective behaviour with no biology involved," says Palacci. Since the haematite is magnetic, it is even possible to steer the crystals in one direction by applying a magnetic field. Such control might be useful if the artificial swarms are to be harnessed for applications.

As the particles automatically fill any gaps that form in the crystal, again thanks to the chemical dynamics of the system, they could be used to create a self-assembling, self-healing material. The work is published in the journal Science today.

Schooled by fish

Iain Couzin of Princeton University says these kinds of systems are very useful for studying biological collective behaviour because researchers have complete control over their interactions – unlike natural systems.

His team has its own swarming experiment published in the same issue of Science, based on schools of fish that prefer to stay in shade. Their paper shows that shining a light on some of the fish in the school causes them to speed up, to get away from the light. But as a result, non-illuminated fish also speed up, even though, if acting purely as individuals, they would have had no reason to do so. "We show just by using simple interactions that schools can have a sense of responsiveness to the environment that individuals do not have," he says.

Couzin sees no reason why such behaviour should be limited to natural systems. "In future it may be possible to create systems of particles that can make collective decisions – something we often think of as only possible in biological systems," he says.

Journal references: Living crystals: Science, DOI: 10.1126/science.1230020; Fish: Science, DOI: 10.1126/science.1225883

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Sony invites press to mystery New York event

SAN FRANCISCO: Sony sent out invitations Thursday to a mystery event in New York City on February 20, sparking rumors that the world would get its first look at a new-generation PlayStation videogame console.

Both Sony and Microsoft are expected this year to show off successors to their competing consoles, which have been evolving into home entertainment hubs for films, television, music, social networking and more.

The PlayStation 3 was released in November 2006 and industry trackers believe a successor is on the near horizon.

In January, the number of PS3 units shipped by Sony hit an estimated 77 million units, according to market research firm International Data Corporation.

IDC gaming research manager Lewis Ward predicted at the time of the report that consoles will retain their strongholds in homes while expanding to include other digital entertainment.

"The console ecosystem is in a state of flux since these platforms need to support an ever-growing array of non-gaming features and services at the same time that game distribution and monetization is moving in a digital direction," Ward said.

"It doesn't appear that alternative platforms -- set-top boxes from cable companies, Web-connected smart TVs and so on -- are positioned to materially disrupt the trajectory of the 'big 3' console OEMs in 2013 or 2014."

Videogame industry sales should be bolstered by the arrival of next-generation videogame consoles from Sony and Microsoft, according to Ward.

"With the advent of eighth-generation consoles, starting with the Wii U, historical norms strongly imply that game disk revenue will stop bleeding in 2013 and rise substantively in 2014," he said in the report.

- AFP/ir

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14 killed in blast at offices of Mexican state oil company

By CNN Staff

updated 8:28 PM EST, Thu January 31, 2013

STORY HIGHLIGHTS

• NEW: 14 people were killed and at least 100 are injured, interior minister says


• NEW: Mexico's president says he is heading to the scene to coordinate rescue efforts


• Rescuers are searching for people trapped in the building, one of the city's tallest


• Witness: "People were screaming. ... You could see pieces of the wall falling"

Mexico City (CNN) -- An explosion rocked the offices of Mexico's state oil company Thursday, killing at least 14 people and injuring dozens more, officials said.

At least 100 people were injured in the Mexico City blast, Interior Minister Miguel Angel Osorio Chong told Foro TV.

Dozens of people were trapped in the building after the blast, Foro TV reported.

Osorio Chong said rescuers were searching for survivors in the basement of the office tower, which is one of the city's tallest skyscrapers.

It was unclear what caused the explosion, which occurred in the building's basement, Pemex spokesman Francisco Montano told Notimex.

A large plume of smoke rose near the building after the explosion, and emergency crews swarmed the scene.

"People were screaming. ... You could see pieces of the wall falling to the ground," said Joaquin Borrell Valenzuela, an attorney for the Pemex comptroller's office, who was in a courtyard outside the building at the time of the blast.

Images from the scene showed emergency rescue teams carrying people on stretchers. Authorities said helicopters carried some of the wounded to hospitals.

Mexican President Enrique Pena Nieto expressed his condolences to victims' families and said in a Twitter post Thursday night that he was heading to the office complex to supervise rescue efforts.

The 54-story office tower is nearly 700 feet tall, was built in 1979 and withstood the 8.1 magnitude earthquake that shook Mexico City in 1985, according to Emporis, a company that tracks building data worldwide.

Officials evacuated the building and operations will cease there until further notice, the company said.

CNN's Catherine E. Shoichet, Rafael Romo, Edwin Mesa, Christine Theodorou, Rey Rodriguez and Rene Hernandez and CNNMexico.com contributed to this report.

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