Saudi youths demonstrate a stunt known as “sidewall skiing” (driving on two wheels) in the northern city of Hail, in Saudi Arabia March 30, 2013. Performing stunts such as sidewall skiing and drifts is a popular hobby amongst Saudi youths. (Photo by Reuters)

A leopard trapped in a well looks up to forest officials on the premises of the Kamakhya temple in Gauhati, India, on April 4, 2013. The animal was later tranquilized and rescued. (Photo by Anupam Nath/AP Photo)

Norway's Anders Bardal jumps during the official training session of the FIS Ski Flying World Cup in Vikersund, Norway on January 25, 2013, while a full moon rises over the mountain. (Photo by Daniel Sannum Lauten/AFP Photo)

A destroyed house stands in the midst of fallen trees near Guiuan, Eastern Samar, in central Philippines November 20, 2013. (Photo by Edgar Su/Reuters)

A view of an ice-covered bench on the shores of Lake Balaton in Balatonfenyves, 155 kms southwest of Budapest, Hungary, 16 March 2013, after water blown by high winds froze in subzero temperatures. (Photo by Gyorgy Varga/EPA)

An excavator moves villagers away from a flooded area during heavy rainfall in Yingxiu, Wenchuan county, Sichuan province, July 10, 2013. (Photo by Reuters/Stringer)

Children sleep on the floor of the Qiaosi subway station in Hangzhou, Zhejiang province July 25, 2013. (Photo by Reuters/Stringer)

A boy carries his dog whilst wading in floodwaters brought by the monsoon rain, intensified by tropical storm Trami, in Paranaque city, metro Manila August 20, 2013. (Photo by Romeo Ranoco/Reuters)

M23 rebel recruits stand at attention during a training session at the Rumangabo military camp in eastern Democratic Republic of Congo May 16, 2013. (Photo by James Akena/Reuters)

A student protester bites a riot policeman while being detained during a riot at a rally demanding Chile's government reform the education system in Santiago. (Photo by Ivan Alvarado/Reuters)

An ironworker uses a line to steady the final piece of a spire, affixed with a U.S. flag, before it is lifted to the top of One World Trade Center in New York, May 2, 2013. (Photo by Lucas Jackson/Reuters)

A man shows a girl how to hold an airsoft gun during the NRA Youth Day at the National Rifle Association's annual meeting in Houston, Texas May 5, 2013. (Photo by Adrees Latif /Reuters)

People watch an aerial show by the Israeli Air Force as part of celebrations for Israel's Independence Day, marking the 65th anniversary of the creation of the state, at Tel Aviv port April 16, 2013. (Photo by Nir Elias/Reuters)

A boy holds his mother's leg as he cries in front of their damaged house after a strong 6.6 magnitude earthquake at Longmen village, Lushan county in Ya'an, Sichuan province. (Photo by Jason Lee/Reuters)

An aerial view of the brine pools and processing areas of the Rockwood lithium plant on the Atacama salt flat, the largest lithium deposit currently in production, in the Atacama desert of northern Chile, January 10, 2013. (Photo by Ivan Alvarado/Reuters)

A rubber glove being used as a marker bobs in the water after flooding in Fox Lake, Illinois April 22, 2013. (Photo by Jim Young/Reuters)

Hindu devotees perform Garba, a traditional folk dance, during the celebrations to mark the Navratri festival at Surat in the western Indian state of Gujarat October 12, 2013. (Photo by Amit Dave/Reuters)

An aerial view of a coastal town, devastated by super Typhoon Haiyan, in Samar province in central Philippines November 11, 2013. (Photo by Maxim Zmeyev/Reuters)

Artist Pyotr Pavlensky sits on the pavestones of Red Square during a protest action in front of the Kremlin wall in central Moscow November 10, 2013. (Photo by Maxim Zmeyev/Reuters)

Activist Margo Frutier from the women's rights group FEMEN is detained by a security personnel after staging a protest near the European Commission during a visit by Tunisia's Prime Minister Ali Larayedh in Brussels, June 25, 2013. (Photo by Laurent Dubrule/Reuters)

A woman looks on as Mount Sinabung spews ash, as pictured from Sibintun village in Karo district, Indonesia's north Sumatra province November 18, 2013. (Photo by Roni Bintang/Reuters)

A rainbow appears above Typhoon Haiyan survivors desperate to catch a flight from the Tacloban airport November 15, 2013. (Photo by Damir Sagolj/Reuters)

A vehicle sits on a pile of debris from the destruction caused by a tornado that touched down in Washington, Illinois. (Photo by Jim Young/Reuters)

Afghan boys play with toy guns on the first day of Eid al-Adha in Jalalabad October 15, 2013. (Photo by Reuters/Parwiz)

A worker cleans an exterior of a newly built urban complex building accommodating offices and retail shops in Beijing October 14, 2013. (Photo by Kim Kyung-Hoon/Reuters)

A girl hugs her brother, a recruit from the presidential regiment, as he takes the oath at a military base in Kiev November 16, 2013. (Photo by Gleb Garanich/Reuters)

A flotilla of bancas (locally made boats) carrying evacuees displaced from their homes due to fighting between government soldiers and Muslim rebels from the Moro National Liberation Front (MNLF), is seen during sunset at a wharf in Zamboanga city, southern Philippines September 14, 2013. (Photo by Erik De Castro/Reuters)

A passenger aircraft, with the full “Harvest Moon” seen behind, makes its final approach to landing at Heathrow Airport in west London, September 19, 2013. (Photo by Toby Melville/Reuters)

Dan McManus and his service dog Shadow hang glide together outside Salt Lake City, Utah, July 22, 2013. (Photo by Jim Urquhart/Reuters)

Rescue officials stand near an Asiana Airlines Boeing 777 plane after it crashed while landing at San Francisco International Airport in California July 6, 2013. (Photo by Jed Jacobsohn/Reuters)

T. J. Lane takes off his shirt to show a white T-shirt with the word “Killer” spelled out on it at his sentencing hearing before Geauga County Judge David Fuhry in Cleveland, Ohio. (Photo by Duncan Scott/Reuters/The News-Herald)

Flashes of lightning strike above the “Baie des Anges”, on October 4, 2013, in Nice, southeastern France. (Photo by Valery Hache/AFP Photo)

A protestor is on fire after a molotov cocktail goes off during a clash with Turkish riot police at Taksim Square in Istanbul, Turkey, 11 June 2013. (Photo by Sedat Suna/EPA)

A woman is rescued from flood waters by a resident standing on top of her car during heavy rain in Chalandri suburb north of Athens February 22, 2013. (Photo by John Kolesidis/Reuters)

(L-R) Andrew “Goofy” Saunders, Dashawn Martin and Raymon “Lex” Santos perform dynamic dance moves while hanging upside-down from the handrails in a New York City subway car. (Photo by Wiktor Skupinski/Barcroft Media)

A leopard seal reaches to bite a penguin as it swims through the sea in Port Lockroy, Antartic Peninsula. (Photo by Wiktor Skupinski/Barcroft Media)

A male jaguar bites a Yacare caiman on a river island on August 25, 2013 in Pantanal, Brazil. (Photo by Justin Black/Barcroft Media)

Jonathan Trappe takes to the air in his balloon cluster system on September 12, 2013 in Caribou, Maine. Balloon aviator Jonathan Trappe's attempt to cross the Atlantic using helium balloons has ended – just twelve hours into the journey. (Photo by Wiktor Skupinski/Barcroft Media)

A super cell thunderstorm illuminates the sky, which was formed at about 2pm in the afternoon and was still raging at 10pm at night, in Sanford, Kansas. (Photo by Wiktor Skupinski/Barcroft Media)

Climbers hang upside down as they climb a giant frozen waterfall. The towering Helmcken Falls in British Columbia, Canada has been dubbed the world's hardest climb and stand at 450ft tall. But despite freezing ice spray, Brit climber Tim Emmett, Raphael Slawinski, from Canada, and Klemen Premrl, from Slovenia, conquered the notorious ice climb. (Photo by Wiktor Skupinski/Barcroft Media)

Protesters flee from tear gas fired by riot police during clashes after protesters removed a concrete barrier at Qasr al-Aini Street near Tahrir Square in Cairo, Egypt, on January 24, 2013. (Photo by Mohamed Abd El Ghany/Reuters)

A handout photo made by the Japan Coast Guard on 20 November 2013 and released on 21 November 2013, shows an aerial view of smoke generated by a volcanic eruption off the coast of Nishinoshima in the Ogasawara archipelago, some 1,000 km south of Tokyo, Japan. (Photo by Japan Coast Guard/EPA)

Model Miranda Kerr attends “Mademoiselle C” New York Premiere at Florence Gould Hall on September 6, 2013 in New York City. (Photo by Michael Stewart/WireImage)

Stella Ferruzola, 3, poses with a Blue Morpho butterfly on her nose at the Sensational Butterflies Exhibition at the Natural History Museum in London March 25, 2013. (Photo by Luke MacGregor/Reuters)

A Bahraini anti-government protester is engulfed in flames when a shot fired by riot police hit the petrol bomb in his hand that he was preparing to throw during clashes in Sanabis, Bahrain, Thursday, March 14, 2013. (Photo by Hasan Jamali/AP Photo)

U.S. Army soldiers carry the flag-draped transfer case containing the remains of U.S. Army Sgt. David J. Chambers, during a dignified transfer at Dover Air Force Base, on January 19, 2013 in Dover, Delaware. Chambers, who was from Hampton, Va., was killed while supporting Operation Enduring Freedom. (Photo by Patrick Smith/Getty Images)

A demonstrator kisses a riot police officer during a protest in Susa, Italy, against the high-speed train (TAV in Italian) line between Lyon and Turin, on November 16, 2013. (Photo by Marco Bertorello/AFP Photo)