A Mikado drone of the Bundeswehr flies during a show of German soldiers at Camp Marmal in Mazar-e-Sharif on December 23, 2013. About 3,000 German troops are deployed in Afghanistan, where the country is the lead nation in the relatively peaceful northern region. (Photo by Johannes Eisele/AFP Photo)

A man walks in a flooded street in Morlaix, Britanny, where the city center is under 1.4 metres (four feet) of water on December 24, 2013. Gale-force winds and pounding rain lashed Britain and France, killing at least two people, disrupting Christmas travel and leaving tens of thousands without power. A total of 240,000 French homes, mainly in the northwestern region of Brittany, were without electricity on Tuesday, according to power supplier ERDF. (Photo by Frank Perry/AFP Photo)

A Kurdish student protestor fires fireworks against Turkish riot policemen on December 24, 2013, in downtown Istanbul, during an anti-government protest marking the second anniversary of a Turkish military air strike aimed at Kurdish rebels that killed 34 civilians working as smugglers at the Turkey-Iraq border in Sirnak. (Photo by Bulent Kilic/AFP Photo)

French troops of the Sangaris operation and civilians try to comfort a boy crying after a demonstrator was shot dead near the international airport in Bangui on December 23, 2013. African Union troops fired on demonstrators protesting against the president of the strife-torn Central African Republic, killing at least one person, according to AFP reporters on the scene. (Photo by Miguel Medina/AFP Photo)

People wearing masks walk in front of the statue of late Chinese leader Mao Zedong in a university, during a hazy day in downtown Shanghai December 26, 2013. (Photo by Aly Song/Reuters)

Shiite Muslim carry a child barefoot across hot coals during a ceremony known as Arbain in the city of Ahmedabad, India, on December 24, 2013. (Photo by Amit Dave/Reuters)

Boston Dynamics' Atlas, a high-mobility, humanoid robot designed to negotiate rough terrain, takes on an irregular surface in this terrain negotiation exercise in Homestead, Florida December 20, 2013. The south Florida city is hosting an international Robotics Challenge Trials this weekend, organized by the U.S. Defense Advanced Research Projects Agency. The competition, for the creation of robots that can respond to natural and man-made disasters, was created following the 2011 Fukushima-Daiichi nuclear power plant disaster in Japan. After the disaster the Pentagon sent robots designed to disarm improvised explosive devices in Iraq to try to help fix problems at the destroyed reactor in areas highly contaminated by radioactive releases where humans could not work. (Photo by Andrew Innerarity/Reuters)

French soldiers conduct a daytime patrol in a neighbourhood in Bangui, where shooting continued overnight in the capital, December 26, 2013. (Photo by Andreea Campeanu/Reuters)

Giant waves break over the pier on the South beach, Arklow, Co Wicklow as high winds continue to lash the country, on December 27, 2013. (Photo by Garry O'Neill/PA Wire)

Swimmers emerge from the Serpentine river in Hyde Park, London, on December 25, 2013. For over 100 years, swimmers have taken part in the Christmas Day “Peter Pan” swim in the Serpentine. (Photo by Suzanne Plunkett/Reuters)

A young man reacts after his friend was badly injured by passing Chadian troops, during a protest outside Mpoko Airport in Bangui, Central African Republic, Monday, December 23, 2013. Hundreds of demonstrators gathered at the entrance to the airport Monday morning carrying signs protesting Chadian forces and expressing support for French troops and other regional African forces. At least two people were wounded as pickups of Chadian soldiers sped through the gathered crowd firing off several rounds. (Photo by Rebecca Blackwell/AP Photo)

People view a large snow sculpture with the 117-meter-long and 26-meter-high at the 26th Harbin International Snow Sculpture Art Expo in Sun Island park on December 22, 2013 in Harbin, China. The Harbin International Ice and Snow Sculpture Festival is one of the largest ice and snow festivals in the world and is a popular winter destination for both Chinese and foreign visitors. (Photo by Hong Wu/Getty Images)

Women bare their chests in a traditional sign of placing a curse, after at least two people were injured by passing Chadian troops, during a protest outside Mpoko Airport in Bangui, Central African Republic, Monday, December 23, 2013. Hundreds of demonstrators gathered at the entrance to the airport Monday morning carrying signs protesting Chadian forces and expressing support for French troops and other regional African forces. At least two people were wounded as pickups of Chadian soldiers sped through the gathered crowd firing off several rounds. (Photo by Rebecca Blackwell/AP Photo)

A plainclothes police officer, left, detains one of the supporters of Egypt's ousted President Mohammed Morsi following their demonstration in Cairo, Egypt, Friday, December 27, 2013. Egyptian security forces fired tear gas and clashed with hundreds of Morsi supporters around the country Friday as authorities tightened security measures in the capital after Morsi's Muslim Brotherhood and its allies renewed calls for mass rallies. (Photo by Ahmed Abd El Latif/AP Photo/El Shorouk newspaper)

Honor guards fire in the air with AK-47 assault rifles during Russian firearms designer Mikhail Kalashnikov's funeral at the Russian Federal memorial military cemetery just outside Moscow, Russia, Friday, December 27, 2013. Kalashnikov died on December 23 at the age of 94. His work as a weapons designer for the Soviet Union is immortalized in the name of the world's most popular firearm, the AK-47 assault rifle, which is often called “a Kalashnikov”. (Photo by Alexander Zemlianichenko/AP Photo)

Russian punk band p*ssy Riot members Nadezhda Tolokonnikova, right, and Maria Alekhina smile during their news conference in Moscow, Russia, on Friday, December 27, 2013. Tolokonnikova and Alekhina were granted amnesty on Monday, December 23, two months short of their scheduled release after spending nearly two years in prison for their protest at Moscow's main cathedral. (Photo by Ivan Sekretarev/AP Photo)

Workers pull a giant ice cube out of the frozen Songhua River as they extract ice to make sculptures for the upcoming 30th Harbin Ice and Snow Festival, in Harbin, Heilongjiang province December 27, 2013. Each ice cube weighs about 250 kilograms (551 lb). According to the festival organizers, nearly 10,000 workers were employed to build the ice and snow sculptures, which require about 180,000 square metres of ice and 150,000 square metres of snow. The festival kicks off on January 5, 2014. (Photo by Sheng Li/Reuters)

Workers and a crane are seen next to a newly-built ice sculpture of a castle ahead of the 30th Harbin Ice and Snow Festival, in Harbin December 27, 2013. (Photo by Sheng Li /Reuters)

The Genesee Towers fall to the ground as explosives detonate for an implosion, Sunday, December 22, 2013 in downtown Flint, Mich. (Photo by Jake May/AP Photo/The Flint Journal)

A tourist makes a sunrise visit to the temple of Karnak on the day of the winter solstice in Luxor, 510 kilometers (320 miles) south of Cairo, Egypt, Saturday, December 21, 2013. Tourism, which accounts for nearly 20 percent of Egypt's foreign currency revenues, has been hard hit by the past three years of turmoil. Government officials have been campaigning to regain some of the European, American and Asian tourism that was suspended following violence this summer. (Photo by Ibrahim Zayed/AP Photo)

In this photo released by China's Xinhua News Agency, a Bolivian communications satellite is launched from the Xichang Satellite Launch Center(XSLC) in Xichang, southwest China's Sichuan Province, Saturday, December 21, 2013. (Photo by Yan Yan/AP Photo/Xinhua)

French soldiers evacuate young men wounded by passing Chadian troops during a protest outside Mpoko Airport in Bangui, Central African Republic, Monday, December 23, 2013. (Photo by Rebecca Blackwell/AP Photo)

Heads only at the Christmas Day Swim in Garryvoe Co. Cork, on December 26, 2013. (Photo by Des Barry)

A cadet from Pakistan Air Force (PAF) is silhouetted against the morning sun during the guard mounting ceremony at the mausoleum of Mohammad Ali Jinnah in Karachi December 25, 2013. A contingent of Pakistan Military Academy (PMA) cadets mounted the guard at the mausoleum of Mohammad Ali Jinnah to mark his 137th birth anniversary. Jinnah is generally regarded as the founder of Pakistan. (Photo by Akhtar Soomro/Reuters)

Joaldunak, or men with cowbells, march through the street as they take part in the Olentzero parade in Bayonne, southwestern France, Saturday, December 21, 2013. Olentzero is a Basque Christmas tradition, the joaldunaks are part of the culture and tradition of the Basque Country at carnival. (Photo by Bob Edme/AP Photo)

Greenpeace International activist Mannes Ubels of Netherlands jumps holding his passport as he celebrates getting permission to leave Russia, near the Federal Migration Service in St.Petersburg, Russia, Thursday, December 26, 2013. Russian investigators have dropped charges against all of the 30 crew of a Greenpeace ship, who were accused of hooliganism following a protest outside a Russian oil rig in the Arctic. (Photo by Dmitry Lovetsky/AP Photo)

Palestinian children play in front of their house in Jabalya refugee camp northern Gaza Strip, Wednesday, December 25, 2013. Israeli air and ground forces launched a series of attacks Tuesday on targets across the Gaza Strip, killing a young girl and wounding several others in response to the deadly shooting of an Israeli civilian by a Palestinian sniper. (Photo by Khalil Hamra/AP Photo)

An employee in Santa outfit greets children as he rappels down from the roof of a hotel during a promotional event to celebrate Christmas in Surabaya, East Java, Indonesia, Monday, December 23, 2013. (Photo by AP Photo/Trisnadi)

Visitors take a picture of Christmas illuminations, lit by 280,000 LED lights, at Tokyo Midtown business and commercial complex in Tokyo, Saturday, December 21, 2013. (Photo by Koji Sasahara/AP Photo)

A worker checks the coal as he roasts pigs in Manila on December 23, 2013 for the busy holiday season. “Lechon”, or roasted pig, has always been a regular fare at Philippine festivities, especially during Christmas and New Year celebrations. The Philippines Christmas season runs from December until the second week of January. (Photo by Noel Celisnoel Celis/AFP Photo)

A protester holds a picture of journalist Tetyana Chornovil, who was beaten and left in a ditch just hours after publishing an article on the assets of top government officials, during a protest rally in front of the Ukrainian Ministry of Internal Affairs in Kiev December 25, 2013. Chornovil, a prominent activist who has given speeches at recent anti-government protests, told police her car was stopped by a vehicle just after midnight. A group of unidentified men got out and broke the rear window of her car. (Photo by Reuters/Stringer)

Maria Alyokhina (C), one of the jailed members of anti-Kremlin punk band p*ssy Riot, is surrounded by journalists and her supporters as she arrives in Moscow on December 23, 2013. Alyokhina, who was freed from prison under a Kremlin-backed amnesty slammed the measure as a mere publicity stunt and said that she would have preferred to remain in prison. (Photo by Kirill Kudryavtsev/AFP Photo)

Mourners carry the body of Odeh Hamad, a 22-year-old Palestinian man, during his funeral in Beit Hanoun, northern Gaza Strip, Saturday, December 21, 2013. Health Ministry spokesman Ashraf al-Kidra in Gaza said Hamad was killed by Israeli forces when he was shot in the head on Friday near the border between Gaza and Israel. (Photo by Hatem Moussa/AP Photo)

An unidentified LS3 team member shoves an LS 3 (Legged Squad Support System) robot that was galloping off course, back on track during a high-speed demonstration in Homestead, Florida December 20, 2013. The device is designed to accompany soldiers and Marines any place they go on foot, helping to carry their gear. The south Florida city is hosting an international Robotics Challenge Trials this weekend, organized by the U.S. Defense Advanced Research Projects Agency. The competition, for the creation of robots that can respond to natural and man-made disasters, was created following the 2011 Fukushima-Daiichi nuclear power plant disaster in Japan. After the disaster the Pentagon sent robots designed to disarm improvised explosive devices in Iraq to try to help fix problems at the destroyed reactor in areas highly contaminated by radioactive releases where humans could not work. (Photo by Andrew Innerarity/Reuters)

Typhoon survivors walk near shipping vessels that remain grounded after being washed ashore during Typhoon Haiyan in Tacloban, Philippines, Monday, December 23, 2013. Villages in the central Philippines were flattened by Haiyan's ferocious winds and the tsunami-like storm surge that damaged or swept away more than a million homes. Haiyan, one of the most powerful storms on record, hit the country's eastern seaboard on November 8. (Photo by Achmad Ibrahim/AP Photo)

A Shinto priest walks across embers during a fire walking ceremony to pray for good health and safety life at Kabasan Saenazumi Jinja shrine in Sakuragawa City, Ibaraki Prefecture on December 22, 2013. The shrine held the festival every year on the day of the winter. (Photo by Kazuhiro Nogi/AFP Photo)

Soldiers with the NATO-led International Security Assistance Force (ISAF) pose with Santa Claus during a special meal on Christmas Day at a military base in Kabul on December 25, 2013. NATO forces are withdrawing from Afghanistan after more than a decade of fighting the Taliban, but negotiations have stalled on a security accord that would allow some US and NATO troops to stay after 2014. (Photo by Noorullah Shirzada/AFP Photo)

An Israeli AH-64 Apache longbow helicopter launches anti-missile flares during an air show at the graduation ceremony of Israeli air force pilots at the Hatzerim base in the Negev desert, near the southern Israeli city of Beersheva on December 26, 2013. (Photo by Jack Guez/AFP Photo)

A man carries a portrait of Soviet dictator Josef Stalin as people attend a gathering marking the 130th anniversary of his birthday in Stalin's hometown of Gori, some 50 miles west of Tbilisi, Georgia, on December 21, 2013. (Photo by David Mdzinarishvili/Reuters)

An honor guard soldier yawns during the commemoration of the 1989 anti-communist uprising, at the Heroes Cemetery in Bucharest, Romania, on December 21, 2013. The uprising, which left more than 1.000 dead, ended the rule of dictator Nicolae Ceausescu. (Photo by Vadim Ghirda/Associated Press)

Runners dance at the finish line of the Ugly Sweater Run at National Harbor in Fort Washington, Maryland, on December 21, 2013. (Photo by James Lawler Duggan/Reuters)

A man watches the sun set on Venice Beach in Los Angeles, on December 21, 2013. (Photo by Lucy Nicholson/Reuters)

Media members surround a woman as she takes off her top as a protest on Ipanema beach in Rio de Janeiro, on December 21, 2013. The protest was aimed against what organizers say is the restraining of topless women on Rio de Janeiro's beaches. Local media reported that the protest was called after an actress was stopped by police officers while she was taking part, half naked, in a photo shoot on a beach to promote her play. (Photo by Ricardo Moraes/Reuters)

Tears stream down the face of Shandi Beardsley as she plays her violin while the names of the homeless who have died are read over the public address system to a crowd gathered at Thomas Paine Plaza in Philadelphia, for Homeless Memorial Day, on December 19, 2013. Nationally, remembrances are scheduled on or near the winter solstice, which is the longest night of the year. (Photo by Michael Bryant/The Philadelphia Inquirer)

A woman has her hair blown by the wind during a snowstorm in Quebec City, on December 22, 2013. (Photo by Mathieu Belanger/Reuters)

A layer of ice coats the leaves of a Japanese maple tree after an ice storm in Toronto, on December 22, 2013. (Photo by Chris Helgren/Reuters)

A surfer rides a wave during the Punta Galea Big Wave Challenge in Punta Galea, Spain, on December 22, 2013. The best big wave riders in the world battled against six local wildcards from the Basque Country. American surfer Grant Baker won the competition. (Photo by Joseba Etxaburu/Reuters)

Anti-government protesters kick at drawings of Tharit Pengdit, chief of the Department of Special Investigation (DSI), after storming into his office during a rally in Bangkok, Thailand, Monday, December 23, 2013. About 5,000 protesters stormed into the DSI office building when the DSI charged the protest leaders on illegal demonstrations and frozen their bank accounts last week. (Photo by Wason Wanichakorn/AP Photo)

A man makes his way through rubble at the scene of an explosion at a police headquarters building that killed at least a dozen people, wounded more than 100, and left scores buried under the rubble, in the Nile Delta city of Mansoura, Egypt, on December 24, 2013. The country's interim government accused the Muslim Brotherhood of orchestrating the attack, branding it a “terrorist organization”. No one immediately claimed responsibility for the bombing, which came a day after an al-Qaida-inspired group called on police and army personnel to desert or face death at the hands of its fighters. (Photo by Ahmed Ashraf/Associated Press)

Swim at Slade, Hook Peninsula, Co. Wexford. Pictured at the St. Stephens Day Swim, at Slade, Hook Peninsula, Co. Wexford is Rosanne Gaffney just after the swim, on December 26, 2013. (Photo by Patrick Browne/PA Wire)

A Pakistani Christian boy eats snacks as he attends mass along with others on Christmas day at St Andrew's Church in Karachi December 25, 2013. (Photo by Athar Hussain/Reuters)

A woman jumps onto the beach in the Adler district of the Black Sea resort city of Sochi, Russia, on December 24, 2013. Sochi will host the 2014 Winter Olympics in February. (Photo by Maxim Shemetov/Reuters)

The body of a dead rebel killed by South Sudan army soldiers during a gunfight lies next to a destroyed military truck near Bor Airport, 108 miles northwest of the capital Juba, on December 25, 2013. South Sudanese troops have retaken the flashpoint town of Bor in Jonglei state, a week after the town fell to rebels loyal to rebel leader Riek Machar. (Photo by James Akena/Reuters)

The Russian ship MV Akademik Shokalskiy is trapped in thick Antarctic ice 1,500 nautical miles south of Hobart, Australia, on December 27, 2013. The research ship, with 74 scientists, tourists and crew on board, was on a research expedition to Antarctica when it got stuck Tuesday after a blizzard's whipping winds pushed the sea ice around the ship, freezing it in place. (Photo by Andrew Peacock/Australasian Antarctic Expedition/Footloose Fotography)

Participants take part in the Matlock raft race in Matlock, England, on December 26, 2013. The Derbyshire Association of Sub-Aqua Clubs organize the Matlock Raft Race in aid of the RNLI (lifeboats). It has been running for over 47 years and has raised more than £200,000. The race starts on the River Derwent in Matlock and finishes at Cromford Meadows two miles downstream. (Photo by Bethany Clarke/Getty Images)

Anti-government protesters clash with police at the gate of the gymnasium where candidates are due to register for the upcoming elections during a rally at the Thai-Japan youth stadium in Bangkok, on December 25, 2013. (Photo by Athit Perawongmetha/Reuters)

Boats in Wuhan, China, carrying a giant image of the late Chinese Chairman Mao Zedong and Chinese national flags, get ready to lead swimmers in an exercise in the Yangtze River to celebrate the 120th anniversary of Mao's birth, on December 26, 2013. (Photo by Reuters)

An anti-government protester throws a tear gas canister towards policemen during clashes at the Thai-Japan youth stadium in Bangkok, on December 26, 2013. (Photo by Athit Perawongmetha/Reuters)

Firefighters battle a wind-driven brush fire in Simi Valley, California, on December 25, 2013. Strong Santa Ana winds spread the fire quickly. Firefighters gained the upper hand, however, in several hours after an all out assault using water dropping helicopters, engines, and hand crews. (Photo by Dan Steinberg/Associated Press)

Flowers are left at a flooded mass grave, where victims of Super Typhoon Haiyan are buried, Tacloban, Leyte, Philippines, on December 24, 2013. Haiyan has been described as one of the most powerful typhoons ever to hit land, leaving thousands dead and hundreds of thousands homeless. With Christianity being the predominant religion in Philippines, the people of Tacloban will try to find a way to celebrate Christmas despite the incredibly difficult circumstances. (Photo by Dondi Tawatao/Getty Images)

Children dressed in Santa Claus costumes wave after attending Christmas celebrations at a church in the northern Indian city of Chandigarh, on December 23, 2013. (Photo by Ajay Verma/Reuters)

A man carries an injured woman at the scene of the explosion in Beirut, on December 27, 2013. The blast went off a few hundred yards from the government headquarters and parliament building. (Photo by Bilal Hussein/Associated Press)

Astronaut Mike Hopkins, Expedition 38 Flight Engineer, is shown in this handout photo distributed today by NASA as he participates in the second of two spacewalks which took place on December 24, 2013. The scheduled spacewalks were designed to allow the crew to change out a faulty water pump on the exterior of the Earth-orbiting International Space Station. He was joined on both spacewalks by NASA astronaut Rick Mastracchio, whose image shows up in Hopkins' helmet visor. (Photo by NASA via Reuters)

Police detain an injured man suspected of being an activist of the banned Islamist organization Hizb-ut-Tahrir, in Dhaka, Bangladesh, on December 27, 2013. Police arrested more than 18 activists suspected of being members of Hizb-ut-Tahrir, after a clash with police. (Photo by Andrew Biraj/Reuters)

A competitor jumps into the sea during the 104th Barcelona Traditional Christmas Swimming Cup at the Old Harbour of Barcelona, on December 25, 2013. The Copa Nadal is organized by the Barcelona Swimming Club and involves competitors swimming across some 200 meters of water in the harbor. Launched in 1908, the event has only been suspended three times, when the Spanish Civil War interrupted proceedings between 1936 and 1938. (Photo by David Ramos/Getty Images)

Four persons posing for the photographer use sparklers as they write the year date “2014” in the air on a field near Jacobsdorf, northeastern Germany, on December 21, 2013 (picture taken with long exposure time). (Photo by Patrick Pleul/AFP Photo/DPA)