A picture made available 20 November 2014 shows four men practicing kung fu in the fog on Landwehrplatz in Saarbruecken, Germany, 19 November 2014. Twice a week people meet on the square to practise the martial art. (Photo by Oliver Dietze/EPA)

Competitors race in the Men's RS-One Windsurfing class during the 2014 Asian Beach Games at Karon Beach on November 16, 2014 in Phuket, Thailand. (Photo by Cameron Spencer/Getty Images)

In this handout image provided by the Volvo Ocean Race, Team Dongfeng at the start of Leg 2 from Cape Town to Abu Dhabi on November 19, 2014 in Cape Town, South Africa. The Volvo Ocean Race 2014-15 is the 12th running of this ocean marathon. Starting from Alicante in Spain on October 04, 2014, the route, spanning some 39,379 nautical miles, visits 11 ports in eleven countries (Spain, South Africa, United Arab Emirates, China, New Zealand, Brazil, United States, Portugal, France, The Netherlands and Sweden) over nine months. The Volvo Ocean Race is the world's premier ocean yacht race for professional racing crews. (Charlie Shoemaker/Volvo Ocean Race via Getty Images)

Art installation “Orage Magnetique” by artist Cedric Verdure is on display during the Lausanne Festival of Light in Lausanne, Switzerland, 19 November 2014. The Lausanne Festival of Light will take place from 21 November to 31 December 2014. The edition will feature ten light performing artists from Switzerland, Germany, France and Finland. (Photo by Laurent Gillieron/EPA)

Demonstrators mark with a protest the 101st day since 18-year-old Michael Brown was killed on November 17, 2014 in Clayton, Missouri. Brown was killed by Darren Wilson, a Ferguson police officer, on August 9. A grand jury in Clayton is sorting through evidence from the shooting to decide if Wilson should be charged in the shooting. The decision is expected sometime this month. (Photo by Scott Olson/Getty Images)

A general view of “COSL Prospector”, the fourth semisubmersible drilling platform built by CIMC Raffles for COSL on November 19, 2014 in Yantai, Shandong province of China. “COSL Prospector”, the fourth semisubmersible platform built by CIMC Raffles for COSL is in 104.5-meter long, 70.5-meter wide and 37.55-meter high, and whose operating depth and drilling depth reach to 1,500 meters and 7,600 meters. The COSL Prospector began to be built in July 2012 and is designed for work in a cold climate with class notation ICE-T and Winterized Basic with covers of working areas and lifeboat stations. (Photo by ChinaFotoPress via Getty Images)

People look at a BIRO City Electric Vehicle designed by Shandong HTM new energy automobile manufacturing Co., Ltd. at Wanda Plaza on November 21, 2014 in Yantai, Shandong province of China. MIKI City Electric Vehicles are high power battery of environmental protection with travelling 150 kilometers in 5 degrees. They are created by Shandong HTM new energy automobile manufacturing Co., Ltd. form the Italy original design and their main components are imported from Italy. The vehicles are the China's first all aluminum body, China's first dual motor drive city electric vehicles and have passed through the EU (L6E) road safety certification. (Photo by ChinaFotoPress via Getty Images)

Cleveland Browns defensive back K'Waun Williams (36) breaks up a pass in the end zone against Houston Texans wide receiver Damaris Johnson in the first quarter of an NFL football game Sunday, November 16, 2014, in Cleveland. (Photo by Tony Dejak/AP Photo)

A Filipino girl looks from inside a Philippine Sokol military helicopter during a static display to celebrate the 75th year of the Department of National Defense at Camp Aguinaldo military headquarters in suburban Quezon City, north of Manila, Philippines on Sunday, November 16, 2014. (Photo by Aaron Favila/AP Photo)

Pro-democracy protesters reinforce barricades with cable ties on a street outside of Citic Tower on November 18, 2014 in Hong Kong. Baliffs oversaw the removal of some barricades blocking access to Citic Tower after an injunction was requested by the owners. Hong Kong's high court has authorized police to arrest protesters who obstruct bailiffs on the three interim restraining orders.The court order comes as democracy protests enter their eighth week. (Photo by Anthony Kwan/Getty Images)

Children play with 50 caliber ammunition from an attack helicopter at Camp Aguinaldo in suburban Manila on November 16, 2014. Military equipment was on display to celebrate the 75th founding anniversary of the Department of National Defence (DND). (Photo by Jay Directo/AFP Photo)

Filipino children play with a machine gun mounted on a Philippine UH-1H military helicopter during a static display to celebrate the 75th year anniversary of the Department of National Defense at Camp Aguinaldo military headquarters in suburban Quezon City, Philippines on Sunday, November 16, 2014. (Photo by Aaron Favila/AP Photo)

Smoke rises from the Syrian city of Kobani, following airstrikes by the US led coalition, seen from a hilltop outside Suruc, on the Turkey-Syria border Monday, November 17, 2014. Kobani, also known as Ayn Arab, and its surrounding areas, has been under assault by extremists of the Islamic State group since mid-September and is being defended by Kurdish fighters. (Photo by Vadim Ghirda/AP Photo)

Guests look at the exhibits on show at the Auckland War Memorial Museum's World of Wearable Art (WOW) exhibition opening at Auckland Museum on November 20, 2014 in Auckland, New Zealand. (Photo by Michael Bradley/Getty Images for Auckland War Memorial Museum)

A Hindu devotee prays on the banks of the River Ganges in Allahabad, India, Friday, November 21, 2014. Allahabad, on the confluence of the rivers Ganges, Yamuna and the mythical Saraswathi, is one of Hinduism's important centers. (Photo by Rajesh Kumar Singh/AP Photo)

Protesters aid a man who was shot in the leg, left, and another who was shot in the neck, lying on the ground, after clashes broke out at an anti-government protest in Port-au-Prince, Haiti, Tuesday, November 18, 2014. The march began peacefully when a crowd grew to a few thousand people in slums that are opposition strongholds. But as demonstrators walked through Delmas 32, the critics of President Michel Martelly's administration and pro-government residents began throwing rocks at each other. (Photo by Dieu Nalio Chery/AP Photo)

Ayanna Williams displays her 23 inch (58 centimeter) nails at a book launch in London, Wednesday, November 19, 2014. The 56 year old stars in a book entitled “Ripley's Believe it or Not! 2015 Annual, Reality Shock”, a compendium of strange but true facts and stories. (Photo by Kirsty Wigglesworth/AP Photo)

Indigenous Andean spiritual counselors known as Amautas spray alcohol on the case protecting a pre-Columbian relic made of carved stone during its presentation at the presidential palace after it was returned from Switzerland, in La Paz, Bolivia, Monday, November 17, 2014. Bolivia recovered the 2000 year old relic after it had been in Switzerland for 156 years. According to experts, it's a woman representing an Ekeko Andean deity, god of fertility and abundance, from the Pucara culture that inhabited the Lake Titicaca region. (Photo by Juan Karita/AP Photo)

A Pakistani boy who is displaced with his family from tribal area of Bajur where security forces are fighting against militants, plays with his donkey in Islamabad's slums, Thursday, November 20, 2014. (Photo by B.K. Bangash/AP Photo)

A car driving at 70 km/h hits a dummy on a scooter in Le Mans, north-western France, on November 20, 2014, during a crash test organized to raise awareness among high school students of the risks of road traffic. (Photo by Jean-Francois Monier/AFP Photo)

Ghost statues by artist Jakub Hadrava are placed at the St. George's church near Plzen on November 16, 2014 in Lukova, Czech Republic. Artist Jakub Hadrava created 32 plaster life-size ghost statues, which symbolize Sudeten Germans who lived in the village. St. George's church, which was build in the north-western Bohemian region of the Czech Republic in 1352, fell into disrepair after the roof collapsed during a funeral service in 1968. Hadrava's aim is to make the church more attractive for visitors and to gain money for renovation work. According to voluntary church manager Petr Koukl, about 2500 people from around the world have been visiting the church this year. (Photo by Matej Divizna/Getty Images)

The combination image of several partially enlarged photographs released by the European Space Agency, ESA, Monday November 17, 2014 shows the journey of Rosetta's Philae lander as it approached and then rebounded from its first touchdown on Comet 67P/Churyumov-Gerasimenko on November 12, 2014. The series of images was captured by Rosetta's OSIRIS camera from a distance of 15.5km (9.6 miles) from the comet surface over a 30 minute period spanning the first touchdown. The time of each of image has marked been marked by source on the corresponding insets and is in GMT. A comparison of the touchdown area shortly before and after first contact with the surface is also provided. From left to right, the images show Philae descending towards and across the comet before touchdown. (Photo by AP Photo/ESA)

A couple wearing masks pose for a portrait as they participate in the Argentina Zombie Walk in Buenos Aires, Argentina, Sunday, November 16, 2014. The procession of the “living dead” is an annual solidarity event in which every participant is asked to bring food that will be donated to a common dinning room from a Buenos Aires shantytown. (Photo by Natacha Pisarenko/AP Photo)

An aerial view shows a sinkhole 3.5 km (2 miles) to the east of Solikamsk-2 mine in Perm region, November 20, 2014. Shares in Russia's Uralkali, the world's top potash producer, fell sharply for a second day on Wednesday after a mine accident that could reduce global supplies and push up prices of the crop nutrient worldwide. Uralkali shares have fallen 28 percent since Tuesday when it suspended work at its Solikamsk-2 mine, which accounts for a fifth of the company's output and 3.5 percent of global capacity, following an inflow of water. A sinkhole, stretching 30 by 40 metres (yards), found at an abandoned mine 3.5 km (2 miles) to the east, increased concern about the future of the mine because an inflow of water and the resulting sinkhole in 2006 forced another Uralkali operation to shut permanently. (Photo by Reuters/Press service of Uralkali company)

A member of an expedition group is seen on the edge of a newly formed crater on the Yamal Peninsula, northern Siberia November 8, 2014. A group of scientists and discoverers in November went on an expedition initiated by the Russian Centre of Arctic Exploration to research the crater after pilots captured it on video in July 2014 which attracted the attention of world public. Participants managed to descend down to about 16 metres (52.4 feet) and reached the frozen surface of the base of the crater with a lake at least 10 metres (32.8 feet) deep below, according to Vladimir Pushkarev, head of the Russian Centre of Arctic Exploration. Experts, including geologists and historians, have not come to a consensus about the origin of the funnel yet, Russian media report. (Photo by Vladimir Pushkarev/Reuters/Russian Centre of Arctic Exploration)

A member of an expedition group stands on the edge of a newly formed crater on the Yamal Peninsula, northern Siberia November 9, 2014. (Photo by Vladimir Pushkarev/Reuters/Russian Centre of Arctic Exploration)

A Pakistani girl who is displaced with her family from the tribal area of Bajur where security forces are fighting against militants, collects recyclable items in Islamabad's slums, Thursday, November 20, 2014, on Universal Children's Day, which is marked annually by the United Nations. (Photo by B.K. Bangash/AP Photo)

Yasui Toshiki of Japan competes in the semi-final of the Men's Wakeboard during the 2014 Asian Beach Games at Bangneow Dam on November 20, 2014 in Phuket, Thailand. (Photo by Cameron Spencer/Getty Images)

The Architect of the Capitol briefs assembled press on the progress of the U.S. Capitol Dome Restoration Project on November, 18, 2014 in Washington, DC. Pictured, a view of the interior of the Rotunda, showing the protection beneath the dome during construction.

A man digs out his driveway in Depew, N.Y.,Wednesday, November 19, 2014. The Buffalo area found itself buried under as much as 5½ feet of snow Wednesday, with another lake-effect storm expected to bring 2 to 3 more feet by late Thursday. (Photo by Derek Gee/AP Photo/The Buffalo News)

A vehicle, with a large chunk of snow on it's top, drives along Route 20 after digging out after a massive snow fall in Lancaster, N.Y. Wednesday, November 19, 2014. Another two to three feet of snow is expected in the area. (Photo by Gary Wiepert/AP Photo)