Walter Frentz, born in 1907, pictured here in his Luftwaffe uniform, is the author of a report produced in the very heart of the top-secret A4-V2 rocket program, including the Blizna test range in Poland as well as the Dora Mittelwerk factory. A fellow-traveler of the Nazi regime since the beginning of the 1930s without being a member of the Nazi party, he was a prominent professional photographer who worked with Leni Riefenstahl and whose work was supported by Albert Speer, the Third Reich’s Minister of Munitions. He used an Agfa color film which required very long exposure times. (Ullstein – Walter Frentz)