Margaret Bourke-White, 1945. Prisoners staring at their American liberators behind barbed wire. The image that brought the Holocaust home.
From Wikipedia
Buchenwald was a German Nazi concentration camp established on Ettersberg hill near Weimar, Germany, in July 1937. It was one of the first and the largest of the concentration camps within the Altreich territories. Many actual or suspected communists were among the first internees.