In April 1945, Kammler disappeared. Some reports suggest that he was assassinated by a member of his staff, acting on orders from Himmler not to allow personnel with detailed knowledge of the rocket programme to fall into Allied hands. Others indicate that he may have been killed in action or committed suicide somewhere around Prague. The facts that his exact fate is unknown, that his body was never recovered, and the many inconsistencies surrounding his disappearance has lead many to speculate that he survived. He may have continued his work in the United States after the war, as did numerous Nazi scientists including rocket scientists Walter Dornberger and Wernher von Braun, where it is alleged he worked on anti-gravity and other advanced devices.