A Polish concentration camp survivor weeps near the charred corpse of a friend at the Leipzig-Thekla subcamp of Buchenwald in 1945. The Nazi SS guards set fire to barracks No. 5 there with approximately 300 prisoners locked inside just before the army's 69th Infantry Division liberated the camp.

Robert Capa was the only photographer to land on Omaha Beach with U.S. troops during the D-Day invasion. Only eight images from the landing were salvageable.

Dickey Chapelle photographed Vietnam while embedded with the U.S. Marines. She was killed by a landmine while on patrol, making her the first war correspondent to die in the Vietnam War.

Kevin Carter worked tirelessly to photograph the anti-apartheid movement in South Africa in the 1990s. Here he photographed members of the African National Congress (ANC) who had staged an attack during a funeral for a member of the Inkatha Freedom Party (IFP).

Catherine Leroy's moving image of U.S. Marine Vernon Wike grieving over his fallen comrade on Battle of Hill 881, is one of her most famous. Forty years later, she photographed Wike again in his home in Colorado. It was her last assignment before she died of cancer in 2006.

This image from 1980 by Philip Jones Griffith shows a West Somalia Liberation Front fighter in Somalia likely high from consuming 'khat,' a leaf containing an amphetamine-like substance. To compensate for food shortages, the soldiers ate large quantities of khat, which made them undisciplined and easy targets for the enemy.

Chris Hondros' image of Samar Hassan, 5, shows how fast things can go wrong during war. Hassan is screaming and covered in blood after her parents were killed by U.S. soldiers in a 2005 shooting in Tal Afar, Iraq. The troops fired on the Hassan family car when it unwittingly approached them during a dusk patrol in the tense northern Iraqi town.