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Peter Hernandez sleds down a hill in Humboldt Park, taking advantage of more than 18 inches of snow that fell in Chicago, Illinois. The snowfall was the fifth largest in the city's history. (Photo: AFP/Scott Olson/Getty Images)

Members of a vigilante group from the Ocotito community are confronted by the Mexican Army on the Chilpancingo road to Acapulco in the Petaquillas community, Guerrero State, Mexico. The vigilante group tried to reach Petaquillas to lend support to allies from this community. (AFP/Jesus Guerrero)

Demonstrators use tyres to block the street in Port-au-Prince during a strike against high oil prices. Protesters clashed with each other and police in the Haitian capital amid demonstrations against high oil prices.  (Photo: AFP/Hector Retamal) 

A general view of a refugee camp for Syrian Kurdish refugees at Suruc, in Sanliurfa. (Photo: AFP/Bulent Kilic)

Ukrainian soldiers assist another soldier, wounded during clashes with pro-Russian separatists near Debaltseve, on a stretcher out of an ambulance at the hospital in the Ukrainian-controlled town of Artemivsk, in the Donetsk region, on Feb 2, 2015.  (Photo: AFP/Manu Brabo)

Pakistani relatives and volunteers gather around an ambulance carrying the body of a convicted militant from the Lashkar-e-Jhangvi from the central jail after they were executed in Karachi on Feb 3, 2015. Pakistan hanged two militants for the murder of a doctor in Karachi (AFP/Rizwan Tabassum)   

A Sri Lankan vendor rides his bike as he sells national flags ahead of the island's independence day in Colombo on Feb 3, 2015. Sri Lanka is preparing to mark the 67th anniversary of independence from Britain on Feb 4. (Photo: AFP/Lakruwan Wanniarachchi)

Sunlight falls on a woman dressed as a clown to earn her livelihood in Sydney on Feb 3, 2015. (Photo: AFP/Saeed Khan)

New Orleans Pelicans guard Quincy Pondexter (20) blocks a shot as Atlanta Hawks guard Dennis Schroder drives to the basket in the second half of an NBA basketball game in New Orleans, Monday, Feb. 2, 2015. The Pelicans won 115-100. (Photo: AP/Gerald Herbert)

Jonas Hiller #1 and Dennis Wideman #6 of the Calgary Flames defend net against Mark Scheifele #55 of the Winnipeg Jets during an NHL game at Scotiabank Saddledome on Feb 2, 2015 in Calgary, Alberta, Canada. (Photo: AFP/Derek Leung/Getty Images)

Ahmed Shehzad of Pakistan plays a shot during the second one-day international cricket match between New Zealand and Pakistan at McLean Park in Napier on Feb 3, 2015. (Photo: AFP/ Marty Melville) 

Flag bearers carry the colors of participating nations during the opening ceremony for the FIS Alpine World Ski Championships, Monday, Feb. 2, 2015, in Vail, Colo. (Photo: AP/Brennan Linsley)