According to André Sellier, a French historian and survivor of the Mittelbau-Dora concentration camp, Heinrich Himmler had von Braun come to his Feldkommandostelle Hochwald HQ in East Prussia in February 1944. To increase his power-base within the Nazi regime, Himmler was conspiring to use Kammler to gain control of all German armament programs, including the V-2 program at Peenemünde. He therefore recommended that von Braun work more closely with Kammler to solve the problems of the V-2. Von Braun claimed to have replied that the problems were merely technical and he was confident that they would be solved with Dornberger's assistance.