In April 1945, when American troops liberated the Dachau concentration camp, the air was thick with disbelief and grief. Soldiers moved through rows of hollow-eyed survivors, their striped uniforms hanging loose from haggard frames. Among the hundreds, one figure stood out, not for strength or stature, but for a single, vivid detail: a crimson ribbon tied carefully in a girl's hair. She couldn't have been more than six or seven years old. Barefoot, her small feet pressed into the cold earth as s