British Prime Minister David Cameron speaks during the Climate Summit at United Nations headquarters in New York, September 23, 2014 (Photo: Reuters)
President Barack Obama and the first lady Michelle Obama walk to greet a group of supporters on the tarmac upon their arrival at JFK International Airport in New York, Tuesday, Sept. 23, 2014 (Photo: AP)
United States President Barack Obama speaks during the Climate Summit at United Nations headquarters in New York, September 23, 2014 (Photo: Reuters)
Kurdish Peshmerga fighters holding new sets of uniforms head to the front line to battle the Islamic State, in Gwar, northern Iraq September 23, 2014 (Photo: Reuters)
Tim Sneed kneels at a new teddy bear memorial on Tuesday, Sept. 23, 2014 (Photo: Reuters)
The CuatroTorres residential building complex is demolished during a controlled implosion, in the city of Medellin September 23, 2014 (Photo: Reuters)
A view shows a stadium on Tikjda mountain, near the village of Ait Ouabane where a Frenchman was kidnapped by militants on Sunday, southeast of Algiers September 23, 2014 (Photo: Reuters)
Europe’s Ian Poulter, left, and Justin Rose prepare to putt on the 15th green during a practice round ahead of the Ryder Cup golf tournament, at Gleneagles, Scotland, Tuesday, Sept. 23, 2014 (Photo: AP)
A spectator wearing tartan walks on a path during practice ahead of the 2014 Ryder Cup at Gleneagles in Scotland September 23, 2014 (Photo: Reuters)
A beachgoer sits under an umbrella as storm clouds gather in the distance,Tuesday, Sept. 23, 2014 (Photo: AP)