Familiar with war’s ghosts, a Cambodian man passes a rusting antiaircraft gun left from days when all the land was a battlefield. This rusted gun is a reminder of Cambodia’s mass genocide under the Khmer Rouge rule from 1975 to 1979.

(Text adapted from and photograph shot on assignment for, but not published in, "Kampuchea Wakens From a Nightmare," May 1982, National Geographic magazine)