Indian Sikh performers demonstrate their skills during a “Nagar Kirtan” road show on the occasion of the three day event, “Prakash Parv” ahead of the birth anniversary celebrations of Guru Gobind Singh in Allahabad on December 26, 2014. (Photo by Sanjay Kanojia/AFP Photo)

A man dressed as Santa Claus drives his old Fiat 500 in the Piazza Venezia in central on December 23, 2014, as people prepare for Christmas. (Photo by Filippo Monteforte/AFP Photo)

Children dressed as angels take part in a mass on the eve of Christmas at the South Cathedral official Catholic church in Beijing, China, Wednesday, December 24, 2014. Estimates for the number of Christians in China range from the conservative official figure of 23 million to as many as 100 million by independent scholars, raising the possibility that Christians may rival in size the 85 million members of the ruling Communist Party. (Photo by Ng Han Guan/AP Photo)

Pakistani women leave the Rahman Baba graveyard after offering prayers at the graves of victims in Tuesday's school massacre in Peshawar, Pakistan, Saturday, December 20, 2014. Taj Muhammad, one of the gravediggers at Peshawar’s largest graveyard has a rule. He said he never cries when he buries the dead. He's a professional, he said. But as the dead bodies, mostly children, started coming in from a school massacre this week that killed 148 people, he began to weep. (Photo by Mohammad Sajjad/AP Photo)

South Korean singer PSY, center, performs during his concert “All Night Stand” in Seoul, South Korea, Saturday, December 20, 2014. (Photo by Lee Jin-man/AP Photo)

Children watch acrobats as they perform in the garden of the presidential palace in Abidjan, on December 20, 2014 during a Christmas event organised by the Fondation Children of Africa. The event, organised by Ivory Coast's first lady Dominique Ouattarra, president of Fondation Children of Africa, welcomed 3000 children from 16 NGOs and organisations helping children to celebrate Christmas at the presidential palace. (Photo by Sia Kambou/AFP Photo)

Amelie and her father Mario leaves the Oranke Lake during the annual Christmas Swimming of the winter and ice swimming club “Seehunde Berlin”, (Berlin Seals), in Berlin, Thursday, December 25, 2014. Every Christmas the club arrange a swim at the lake. (Photo by Markus Schreiber/AP Photo)

Members of the ice swimming club “Berliner Seehunde” (Berlin Seals) take a dip in the Orankesee lake in Berlin as part of their traditional Christmas ice swimming session, December 25, 2014. (Photo by Fabrizio Bensch/Reuters)

Issa Kassissieh, an Israeli-Arab Christian, wears a Santa Claus costume as he poses for the media in Jerusalem's Old City, during the annual distribution of Christmas trees by the Jerusalem municipality December 22, 2014. (Photo by Dusan Vranic/AP Photo)

Student activists hold candles as they march during a prayer for casualties of Chinese-backed copper mine crackdown, in Yangon, Myanmar, December 23, 2014. (Photo by Lynn Bo Bo/EPA)

A Chinese People's Liberation Army soldier closes a curtain after members of honor guard rehearse for a welcome ceremony held by Chinese President Xi Jinping for visiting Egyptian President Abdel-Fattah el-Sissi at the Great Hall of the People in Beijing, China Tuesday, December 23, 2014. (Photo by Andy Wong/AP Photo)

Ukrainian government army soldiers patrol an area in the village of Debaltseve, Donetsk region, eastern Ukraine Wednesday, December 24, 2014. Peace talks aimed at reaching a stable cease-fire in Ukraine between its government forces and pro-Russian armed groups began on Wednesday in Minsk, Belarus, with the discussions to include a pullout of heavy weapons and an exchange of war prisoners. (Photo by Sergei Chuzavkov/AP Photo)

Women residents pass by a group of the Ukrainian government army soldiers in the village of Debaltseve, Donetsk region, eastern Ukraine Wednesday, December 24, 2014. (Photo by Sergei Chuzavkov/AP Photo)

A paper panda wearing a Santa Claus hat is displayed in front of the Sultan Abdul Samad building, a Malaysian iconic building, in Kuala Lumpur, Malaysia, December 21, 2014. The Paper pandas were created by French artist Paulo Grangeon, who crafted 1,600 pandas. The creations, which were made in six different shape and size, will visit more than 15 iconic landmarks in Malaysia under the theme “Initiating the Culture of Creative Conservation”. The tour will run from December 21, 2014 to January 25, 2015 to promote the message of panda conservation and sustainable development. The 1,600 paper pandas mark the number of the current living pandas left in the wild. (Photo by Azhar Rahim/EPA)

A Malaysian women look at the panda during 1600 Pandas World Tour in Malaysia on December 21, 2014 in Kuala Lumpur, Malaysia. (Photo by Samsul Said/Getty Images)

A Malaysia women smile as she seat between Panda sculptures during 1600 Pandas World Tour in Malaysia on December 21, 2014 in Kuala Lumpur, Malaysia. 1600 pandas made by French artist Paulo Grangeon jointly with WWF with recycled paper are being exhibited in Kuala Lumpur. The paper-made panda exhibition aims at advocating more people to participate in protecting endangered animals. (Photo by Samsul Said/Getty Images)

A competitor in Christmas fancy dress jumps into the sea during the 105th Barcelona Traditional Christmas Swimming Cup at the Old Harbour of Barcelona on December 25, 2014 in Barcelona, Spain. The Copa Nadal is organised by the Barcelona Swimming Club and involves competitors swimming across some 200 metres of water in the harbour. 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)

Filipino workers turn bamboo poles used in pigs at a roasting pit in suburban Quezon city, Philippines on Tuesday, December 23, 2014. Roasted pig is popular during Filipino celebrations and traditionally served during a Christmas eve dinner called “Noche Buena” in this predominantly Roman Catholic nation. (Photo by Aaron Favila/AP Photo)

A Filipino worker arranges roasted pigs which they sell in suburban Quezon city, Philippines on Tuesday, December 23, 2014. Roasted pig is popular during Filipino celebrations and traditionally served during a Christmas eve dinner called “Noche Buena” in this predominantly Roman Catholic nation. (Photo by Aaron Favila/AP Photo)

Workers wrap an evenly cooked roasted calf to be delivered to a buyer in Manila on December 23, 2014, for the busy holiday season. “Lechon”, or roasted calf, 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 Celis/AFP Photo)

A 10-year-old Filipino boy turns a bamboo pole as he helps his parents work at a pig roasting pit in suburban Quezon city, Philippines on Tuesday, December 23, 2014. (Photo by Aaron Favila/AP Photo)

Guns and gloves of India's Air Force soldiers lie on a road during rehearsals for the upcoming Republic Day parade in New Delhi, India, Tuesday, December 23, 2014. India marks Republic Day on January 26 with military parades across the country. (Photo by Tsering Topgyal/AP Photo)

Children from Dofteana, northern Romania, some wearing bear furs, dance while performing a holiday season ritual in Bucharest, Romania, Tuesday, December 23, 2014. In pre-Christian rural traditions, dancers wearing colored costumes or animal furs, touring house to house in villages singing and dancing to ward off evil. In recent years following the economic downturn in Romania, a European Union member since 2007, the tradition has moved to Romania's cities where dancers travel to perform the ritual for money during the Christmas and New Year's period. (Photo by Vadim Ghirda/AP Photo)

Children from Dofteana, northern Romania, some wearing bear furs, enter a subway station on their way to the city center, to perform a holiday season ritual in Bucharest, Romania, Tuesday, December 23, 2014. (Photo by Vadim Ghirda/AP Photo)

A child from from Dofteana, northern Romania wearing a bear fur, lies on an office building's steps while taking a break from performing a holiday season ritual in Bucharest, Romania, Tuesday, December 23, 2014. (Photo by Vadim Ghirda/AP Photo)

This computer image provided by the European Space Agency (ESA), Tuesday, December 2, 2014, shows the Ariane 6 launcher. European governments have agreed to fund the development of Ariane 6, a next-generation rocket that will be used to launch satellites into orbit. About €4 billion have been earmarked for Ariane 6, of which €400 million will come from industry, officials said. A review of progress will be made in 2016. Over 10 years, the 20-nation alliance will spend about €8 billion on its launcher program, including infrastructure such as a new launch pad at its base in Kourou, French Guiana. The Ariane 5 traces its roots back nearly three decades. A medium-to-heavy workhorse with an unbroken string of 62 successful launches to its name, it accounts for more than half of the world’s commercial launch market. Despite its reliability, Ariane 5 comes with high operational costs compared to nimble U.S. commercial newcomers such as SpaceX. (Photo by David Ducros/AP Photo/ESA)

New York City Ballet dancers from this year's production of The Nutcracker visit the floor of the New York Stock Exchange on the morning of December 24, 2014 in New York City. The market opened above 18,000 points for the first time in its history this morning. (Photo by Andrew Burton/Getty Images)

People enjoy the artificial snow made of foam at Tanglin Mall shopping centre on December 24, 2014 in Singapore. The mall has been holding the avalanche and snow show yearly as part of the Christmas festivities celebration in Singapore. (Photo by Suhaimi Abdullah/Getty Images)

Fireworks explode over a giant Christmas tree during the event “Beirut Christmas carnival” organized by Beirut municipality in Beirut, Lebanon, December 20, 2014. Beirut is one of the most religiously diverse cities of the Middle East with big Christians and Muslim communities. (Photo by Nabil Mounzer/EPA)

Dancers celebrate during a Christmas tree lighting in downtown Beirut December 20, 2014. (Photo by Jamal Saidi/Reuters)

Israeli air force cadets toss their caps into the air during a graduation ceremony for new pilots in the Hatzerim air force base near the city of Beersheba, southern Israel, Thursday, December 25, 2014. (Photo by Tsafrir Abayov/AP Photo)

An Israeli Air Force Apache helicopter releases flares during a graduation ceremony for new pilots in the Hatzerim air force base near the city of Beersheba, southern Israel, Thursday, December 25, 2014. (Photo by Tsafrir Abayov/AP Photo)