A woman dressed as Santa Claus poses in front of the Bridge of Sighs in Venice December 21, 2014. (Photo by Manuel Silvestri/Reuters)

A boy carries a mortar shell left behind by forces loyal to Syria's President Bashar al-Assad at the Azaalana checkpoint, after rebels took control of two military posts from the forces, in the southern Idlib countryside December 20, 2014. (Photo by Khalil Ashawi/Reuters)

People dressed as Santa Claus ride their gondolas past the Rialto bridge in Venice December 21, 2014. (Photo by Manuel Silvestri/Reuters)

Two foreign flagged fishing boats registered in Papua New Guinea are destroyed by the Indonesian Navy after they were seized earlier for supposedly illegal fishing off the coast of Ambon, Maluku December 21, 2014 in this photo taken by Antara Foto. (Photo by Izaac Mulyawan/Reuters/Antara Foto)

An Indonesian Navy plane passes over two foreign flagged fishing boats registered in Papua New Guinea as they are being destroyed by the navy after were seized earlier for supposedly illegal fishing off the coast of Ambon, Maluku December 21, 2014 in this photo taken by Antara Foto. (Photo by Izaac Mulyawan/Reuters/Antara Foto)

Swimmers dressed as Santa Claus pose for photographers with a Monaco flag during the traditional Christmas season swim in Monaco December 21, 2014. A hundred swimmers took part in the yearly event in the Mediterranean Sea waters which measured 16 degrees Celsius (60 degrees Fahrenheit). (Photo by Eric Gaillard/Reuters)

People from the minority Yazidi sect are seen at Mount Sinjar, in the town of Sinjar, December 21, 2014. Iraqi Kurdish fighters flashed victory signs as they swept across the northern side of Sinjar mountain on Saturday, two days after breaking through to free hundreds of Yazidis trapped there for months by Islamic State fighters. (Photo by Ari Jalal/Reuters)

People from the minority Yazidi sect pass a destroyed military vehicle belonging to Islamic State militant at Mount Sinjar, in the town of Sinjar, December 21, 2014. (Photo by Ari Jalal/Reuters)

U.S. President Barack Obama's motorcade drives by a Christmas tree after his round of golf at Marine Corps Base Hawaii December 21, 2014. The President and his family are currently on their annual Christmas holiday season vacation. (Photo by Gary Cameron/Reuters)

An employee of Shiniuzhai Scenic Resort dressed as Santa Claus hangs beside a cable car as he presents gifts to visitors, in Pingjiang, Hunan province, December 20, 2014. (Photo by Reuters/Stringer)

A man (R) dressed in a traditional Han costume and protection gear, runs towards a woman shooting arrows with a bow during a performance called “Da Ba Wang” (or Fight the Overlord) at a tourism resort in Xi'an, Shaanxi province December 20, 2014. The performance, organized by a group of local enthusiasts of costumes from the Han dynasty, aimed to reintroduce winter exercises commonly practised by ancient Chinese soldiers, local media reported. The “Overlord” refers to Xiang Yu, a military leader who rebelled against the Qin Dynasty but lost the battle against the founding emperor of Han Dynasty Liu Bang. (Photo by Reuters/Stringer)

A homemade submarine named “Shenlong-3” made by Zhang Junlin, a 62-year-old retired prison guard, is pictured at a factory in Fuyang, Anhui province December 20, 2014. Zhang spent 2 years with his team to build the 15-metre-long (49-ft) submarine, which weighs about 25 tons and can hold up to 20 people. The submarine, the third one made by Zhang and his team, will be put under a test run in water soon, according to local media. (Photo by Reuters/China Daily)

Zhang Junlin, a 62-year-old retired prison guard, stands inside his homemade submarine named “Shenlong-3” at a factory in Fuyang, Anhui province December 20, 2014. (Photo by Reuters/China Daily)

Zhang Junlin, a 62-year-old retired prison guard, enters his homemade submarine named “Shenlong-3” at a factory in Fuyang, Anhui province December 20, 2014. (Photo by Reuters/China Daily)

A worker makes a bronze statue of China's late Chairman Mao Zedong at a factory in Shaoshan, Hunan province, December 7, 2014. Friday, December 26, 2014 will mark the121st birth anniversary of Mao. (Photo by Darwin Zhou/Reuters)

A limestone statue of China's late Chairman Mao Zedong is seen in a yard, in Shaoshan, Hunan province, December 6, 2014. The text on the wall reads “Comrade Zedong”. (Photo by Darwin Zhou/Reuters)

A worker carries a wax mould of China's late Chairman Mao Zedong as he walks out of a factory which produces statues of Mao in Shaoshan, Hunan province, December 7, 2014. (Photo by Darwin Zhou/Reuters)

Tian Haiming, a sculptor, burns incense in front of a copper statue of China's late Chairman Mao Zedong before handing it to the buyer, in Shaoshan, Hunan province, December 8, 2014. (Photo by Darwin Zhou/Reuters)

Honda Senior Managing Officer Sho Minekawa poses in front of the new Honda N-Box Slash during its presentation at the carmaker's headquarters in Tokyo December 22, 2014. (Photo by Thomas Peter/Reuters)

A man opens the backdoor of the new Honda N-Box Slash during its presentation at the carmaker's headquarters in Tokyo December 22, 2014. (Photo by Thomas Peter/Reuters)

Man looks at the new Honda N-Box Slash during its presentation outside the carmaker's headquarters in Tokyo December 22, 2014. (Photo by Thomas Peter/Reuters)

Participants dressed as white bears saw an oversized replica of a one Russian rouble coin as they stage a performance during a rally near the “White House” (R), the headquarters of the federal government, in Moscow, December 22, 2014. Participants, mostly supporters of the Communist Party, protested against the policies conducted by the Russian government and demanded the resignation of Prime Minister Dmitry Medvedev, according to organizers. (Photo by Sergei Karpukhin/Reuters)

People walk past mannequins behind a window, with a T-shirt displaying a portrait of Russian President Vladimir Putin, in Moscow, December 22, 2014. The Russian rouble has extended its daily against the U.S. dollar on Monday thanks to foreign currency sales by exporters ahead of tax payments. The T-shirt reads, “In Rouble I trust”. (Photo by Sergei Karpukhin/Reuters)

Replica sculptures of “David” and “Venus de Milo” are seen on a street, as they are being transported to a furniture shop as decoration pieces, in Shanghai December 22, 2014. (Photo by Aly Song/Reuters)

A street vendor pulls out carp from a plastic tank at a market in central Prague December 22, 2014. Carp is traditionally served for Christmas Eve dinner in the Czech Republic. (Photo by David W. Cerny/Reuters)

Shayanna Jenkins, fiancee of former New England Patriots NFL football player Aaron Hernandez, stands during a pre-trial hearing in Fall River, Massachusetts December 22, 2014. Jenkins faces perjury charges for lying to a grand jury hearing the case against Hernandez, who is awaiting trial on charges of murdering semi-professional football player Odin Lloyd in 2013. (Photo by Brian Snyder/Reuters)

Relatives stand in front of pictures of Lebanese passenger Bilal al-Dehaini, his wife and his three children, who were among the Lebanese victims of Air Algerie flight AH5017, during their funeral in al-Kharayeb village, southern Lebanon December 22, 2014. The Air Algerie flight crashed in July en route from Ouagadougou in Burkina Faso to Algiers with 110 passengers on board, an Algerian aviation official said. (Photo by Ali Hashisho/Reuters)

A diver dressed as Santa Claus swims inside a fish tank before feeding fish at the Malta National Aquarium in Qawra, outside Valletta December 22, 2014. (Photo by Darrin Zammit Lupi/Reuters)

A diver dressed as Santa Claus feeds fish inside a fish tank at the Malta National Aquarium in Qawra, outside Valletta December 22, 2014. (Photo by Darrin Zammit Lupi/Reuters)

A diver dressed as Santa Claus feeds fish inside a fish tank at the Malta National Aquarium in Qawra, outside Valletta December 22, 2014. (Photo by Darrin Zammit Lupi/Reuters)

NASA's Solar Dynamics Observatory, which watches the sun constantly, captured an image of the event sun emitting a significant solar flare, peaking at 19:28ET/00:28 on December 19, 2014, provided by NASA. This flare is classified as an X1.8-class flare. X-class denotes the most intense flares, while the number provides more information about its strength. An X2 is twice as intense as an X1, an X3 is three times. (Photo by Reuters/NASA)

Poland's Dawid Kubacki soars through the air during the men's FIS Ski Jumping World Cup competition in Engelberg, central Switzerland, on December 20, 2014. (Photo by Fabrice Coffrini/AFP Photo)