Courtesy of Greg Dawson
Greg Dawson examines his mother's name on a wall at Drobitsky Yar outside Kharkov, Ukraine. Starting on Dec. 26, 1941, the Nazis slaughtered more than 16,000 Jews there. In the subterranean Room of Tragedy, the names of 4,300 of the dead are etched on the walls, illuminated by candlelight. Dawson's mother, though, escaped the fate that the wall records, and Dawson returned to Ukraine in 2006 to research a book about her life.