Activists wearing masks of former NSA analyst Edward Snowden, right, Brazil's President Dilma Rousseff, center, and President Barack Obama perform with an oversized passport outside the foreign ministry to demand Snowden be granted asylum in Brasilia, Brazil, Thursday, February 13, 2014. Last year, Snowden revealed that the United States collected data on billions of telephone and email conversations in Latin America's biggest country, including Rousseff's communications with aides. (Photo by Eraldo Peres/AP Photo)

Performers take part in a dragon dance during a night parade to celebrate Chinese New Year in Kuala Lumpur, Malaysia, Sunday, February 9, 2014. The Lunar New Year this year marks the Year of the Horse in the Chinese calendar. (Photo by Vincent Thian/AP Photo)

Norway's skip Thomas Ulsrud acknowledges the cheers of fan Rune Eikeland during men's curling competition against China at the 2014 Winter Olympics, Friday, February 14, 2014, in Sochi, Russia. (Photo by Robert F. Bukaty/AP Photo)

Aubrey O'Day shopping for Valentine's Day at Mark Wong Nark boutique at Sunset Plaza; West Hollywood, California, United States, on 14th February 2014. (Photo by Winston Burris/WENN.com)

An Indian policewoman tries to detain Kashmiri lawmaker Sheikh Abdul Rashid (C), president of Awami Ittihad Party (AIP), a pro-India party, along with supporters during a protest in Srinagar February 9, 2014. Authorities imposed restrictions across Srinagar as separatists called for a three-day shutdown to demand for the remains of Mohammad Afzal Guru, a Kashmiri man who was executed on February 9, 2013, for an attack on India's parliament in 2001, local media reported on Sunday. (Photo by Danish Ismail/Reuters)

People cry after losing all of their belongings in a fire at a slum at Mirpur in Dhaka February 11, 2014. According to local media, at least 200 shanties and 20 shops were destroyed in the fire on Tuesday, which was caused by an electric short circuit at a slum in the Mirpur area of Dhaka. (Photo by Andrew Biraj/Reuters)

Jikany Nuer White Army fighters, a local youth militia affiliated with the rebels, walk in Upper Nile State February 12, 2014. South Sudanese rebels withdrew on Tuesday a threat to boycott peace talks with the government, saying mediators had promised to address their list of demands. (Photo by Goran Tomasevic/Reuters)

Vehicles are piled up in an accident, Friday, February 14, 2014, in Bensalem, Pa. Traffic accidents involving multiple tractor trailers and dozens of cars have completely blocked one side of the Pennsylvania Turnpike outside Philadelphia and caused some injuries. (Photo by Matt Rourke/AP Photo)

Firefighters work at the site of a bus crash in Sao Paulo February 12, 2014. Two people died and eight were injured in the accident on Wednesday when the bus lost control and crashed into a passenger car. (Photo by Paulo Whitaker/Reuters)

National Corvette Museum photo shows a sink hole that swallowed eight Corvettes in Bowling Green, Kentucky in this image released to Reuters on February 12, 2014. (Photo by Reuters/National Corvette Museum)

Commuters hang onto a crowded local passenger train in the eastern Indian city of Patna February 12, 2014. India's interim railway budget has left passenger fares and freight rates unchanged, ahead of the national elections due in next three months. (Photo by Krishna Murari Kishan/Reuters)

Military policemen take cover during a clash with members of the Landless Workers Movement (MST) at a demonstration in Brasilia February 12 , 2014. (Photo by Ueslei Marcelino/Reuters)

A girl sticks out her tongue during snowfalls on a street in Hefei, Anhui province February 13, 2014. (Photo by Reuters/Stringer)

Riot police use tear gas and water canon to disperse protesters as they try to march to the parliament during a protest against Turkey's ruling Ak Party (AKP) and Prime Minister Tayyip Erdogan in Ankara February 13, 2014. (Photo by Umit Bektas/Reuters)

An opposition protester holds a shield depicting, what he said, is a self-portrait with his girlfriend in a sign of love on a Valentine's Day while protesters prepare for a rally in Kiev's Independence Square, the epicenter of the country's current unrest, Ukraine, Friday, February 14, 2014. (Photo by Efrem Lukatsky/AP Photo)

Men wearing pig masks carry their girlfriends on their backs as they run to be selected as finalists during a kissing contest held in celebration of Valentine's Day at the Happy Valley amusement park in Beijing February 14, 2014. About 100 couples competed by kissing in various poses during the competition and an iPhone 5S was presented to the winning couple. (Photo by Kim Kyung-Hoon/Reuters)

Gilberto Lozada of Winchester, Va. constructs the base of his Valentine's Day snow sculpture in the city's Jim Barnett Park Friday, February 14, 2014. Lozada used food coloring to tint the work and said he was going to shoot a photo to e-mail to a friend in New Jersey as a Valentine's Day greeting. (Photo by Jeff Taylor/AP Photo/The Winchester Star)

A masked girl shouts while sitting on the street, in protest against the increase on bus fares in Rio de Janeiro, Brazil, on February 10, 2014. (Photo by Leo Correa/Associated Press)

The dome displays impressions of the universe during the presentation of the new show “Journey to a billion Suns” in the Zeiss Planetarium in Jena, Germany, on February 12, 2014. The program produced in cooperation with the European Space Agency ESA and planetariums in the world tells the fascinating story of mapping the Milky Way, from ancient times to ESA's recently launched Gaia mission. (Photo by Jens Meyer/Associated Press)

Flood waters inundate the area as one house stands alone near the flooded village of Moorland in Somerset, southwest England, Thursday February 13, 2014. The house is owned by Sam Notaro, who has built his own levee to hold back the flood waters, as the local communities face further misery in the coming days with heavy rain, wind and snow predicted to sweep across Britain. (Photo by Steve Parsons/AP Photo/PA Wire)

Bangladeshi girls put vermillion powder on each other as they celebrate the arrival of spring on the first day of Falgoon at the Dhaka University campus in Dhaka, Bangladesh, Thursday, February 13, 2014. Falgoon is the eleventh month in Bengali calendar. (Photo by A. M. Ahad/AP Photo)

Models wear a design created by Plus Size Fashion during London Fashion Week Autumn/Winter 2014, at Vinopolis in central London, Friday, February 14, 2014. (Photo by Jonathan Short/AP Photo)

Rough waves pound the pier at Douro's river mouth in Porto, Portugal, Monday February 10, 2014. The Portuguese weather institute put the entire coast of Portugal on red alert, the most serious in a scale of four, due to rough seas and gale force winds as storm Stephanie moves in. (Photo by Paulo Duarte/AP Photo)

A couple take part in a kissing competition to celebrate Valentine's day in the Taipei Train Station on February 14, 2014. Valentine's day and the Lantern Festival are celebrated on the same date this year as the festival is celebrated on the fifteenth day of the first month in the lunar year in the Chinese calendar. (Photo by Mandy Cheng/AFP Photo)

Visitors enjoy the “United Visual Artists: Momentum” installation at The Curve at the Barbican Centre in London, on February 12, 2014. The installation consists of 12 pendulums suspended overhead along the 90m length of the Curve. Each pendulum projects a horizontal plane of light, plus a vertical spotlight on a darkened environment filled with water-based smoke. (Photo by Bethany Clarke/Getty Images for Barbican Art Gallery)

Undated Ministry of Defence handout photo of the crew of the Royal Navy destroyer HMS Daring sending a Valentine's message to their loved ones back home by forming a red heart on the warship's flight deck. The message saying “I Love You” was formed by sailors aboard the Type 45 destroyer heads back to its home base of Portsmouth, Hampshire, having spent nine months on deployment – one of the navy's longest missions. (Photo by Keith Morgan/MoD/Crown Copyright/PA Wire)

Anna Kendrick, Emmy Rossum, Julie Henderson and Cat Deeley attend the Monique Lhuillier fashion show during Mercedes-Benz Fashion Week Fall 2014 at The Theatre at Lincoln Center on February 8, 2014 in New York City. (Photo by Stephen Lovekin/Getty Images for Mercedes-Benz Fashion Week)

Villagers covering their faces from volcanic ash follwoing Mount Kelud's eruption in Solo, Indonesia, Friday, February 14, 2014. The major volcanic eruption shrouded a large swath of the country's most heavily populated island in ash on Friday, triggering the evacuation of more than 100,000 people and the closure of three international airports after killing two people. (Photo by Hafidz Novalsyah/AP Photo)

A woman and two children are surrounded by police and municipal security forces during clashes with residents of Borei Keila community on February 14, 2014 in Phnom Penh, Cambodia. A building which has been occupied for the last two days has been raided by the Cambodian Security forces who sought to forcibly evict the residents. Early on the morning of Valentine's Day, the road leading into Borei Keila was blocked by riot police, military police, and municipal security guards, who had been deployed to remove all of the families which had occupied the building. Over the course of the violent eviction, at least 6 people were injured, including a woman who was 6 months pregnant. Two days before, on Wednesday, more than 150 people, who had been evicted from their former homes in Borei Keila in January 2012, had moved into the building. The housing building had been promised to them in 2003, as part of a land sharing agreement when the land of Borei Keila had been leased to a private company. The families who had chosen to stay in Borei Keila were violently evicted in 2012 by over 100 security forces, who destroyed more than 200 homes. (Photo by Omar Havana/Getty Images)