Tibetan students play at a class break at the Xiangnong primary school on April 15, 2005 in Kangding County of Ganzi Tibetan Autonomous Prefecture, Sichuan Province, southwest China. There is only one teahcer in the Tagong Village, 12 Tibetan students get free education from him in Xiangnong primary school. (Photo by China Photos/Getty Images)

Egyptian President Hosni Mubarak speaks to the media after talks with German Chancellor Angela Merkel at the Chancellery on April 23, 2008 in Berlin, Germany. (Photo by Sean Gallup/Getty Images)

A man dressed as a zombie poses during the Thrill The World 2009 event, which sees fans from all over the world dance simultaneous to Michael Jackson's “Thriller” at Luna Park on October 25, 2009 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

A model walks the runway at the Luca Luca Spring 2012 fashion show during Mercedes-Benz Fashion Week at The Stage at Lincoln Center on September 9, 2011 in New York City. (Photo by Frazer Harrison/Getty Images for Mercedes-Benz Fashion Week)

Contestants compete in the swimsuit segment of the Miss Venezuela 2012 pageant in Caracas August 30, 2012. The winner of the competition will participate in the 2013 Miss Universe pageant. (Photo by Carlos Garcia Rawlins/Reuters)

David Nickerson, 28, competes dressed as artist Bob Ross, during the ZJ Boarding House Halloween Surf Contest in Santa Monica, California October 26, 2013. (Photo by Lucy Nicholson/Reuters)

Sumo wrestlers of Nishonoseki clan appeal to the winner of a training bout for the next opponent during a joint training session ahead of the May Grand Sumo Tournament in Tokyo May 2, 2015. (Photo by Toru Hanai/Reuters)

Birds fly over the Atomic Bomb Dome in Hiroshima, western Japan July 29, 2015. On August 6, 1945, the U.S. dropped the atomic bomb on Hiroshima, killing about 140,000 by the end of the year in a city of 350,000 residents, in the world's first nuclear attack. Three days later, a second atomic bomb was dropped on Nagasaki. Influenced by the shadows scorched into outdoor surfaces by the heat of the blasts 70 years ago, Reuters photographer Issei Kato pays homage to survivors, residents and historic buildings in both cities in a personal project that captures the shadows of today. (Photo by Issei Kato/Reuters)