Afghan refugee youth are silhouetted against the sunset as they gather at a slum on World Refugee Day on the outskirts of Islamabad, Pakistan on Wednesday, June 20, 2012. World Refugee Day, a day initiated by the United Nations to raise awareness on the plight of refugees worldwide, is observed on June 20 every year.

A car sits in a giant sinkhole in Duluth, Minn. Wednesday, June 19, 2011. Residents evacuated their homes and animals escaped from pens at a zoo as floods fed by a steady torrential downpour struck northeastern Minnesota, inundating the city of Duluth, officials said Wednesday.

Bryan Clay of Austin, Tex., takes off his shirt as he warms up before the U.S. Olympic Track and Field Trials Wednesday, June 20, 2012, in Eugene, Ore. Clay, the current Olympic champion in the decathlon, is scheduled to compete.

People put together a jigwaw puzzle of a self portrait of Albrecht Duerer in front of the state historical museum in Manezh Square outside the Kremlin in Moscow, Wednesday, June 20, 2012. The 300 square meter puzzle will be set up on the occasion of the "German Year" in Russia.

Afghan refugees wait for transport to leave for Afghanistan at a repatriation center run by the United Nations High Commissioner for Refugees, on World Refugee Day, in Peshawar, Pakistan, Wednesday, June 20, 2012. World Refugee Day, a day initiated by the United Nations to raise awareness on the plight of refugees worldwide, is observed on June 20 every year.

Activists push an inflatable globe during a "Global March" as part of the People's Summit for Social and Environmental Justice in Defense of the Commons, a parallel event during the UN Conference on Sustainable Development, or Rio+20, in Rio de Janeiro, Brazil, Wednesday, June 20, 2012.