Sawatzki decreed that fifty were to be produced in December. Given the labor and parts issues, Rudolph was barely able to produce four rockets that were later returned from Peenemünde as defective. There are estimates that between 12–20,000 prisoners died while building the V-2 rockets at Mittelwerk. More than the actual V-2 bombardments. In 1944, Himmler convinced Hitler to put the V-2 project directly under SS control, and in August replaced Dornberger with SS General Hans Kammler as its director. In January 1945 the SS ordered all of the civilians and prisoners, including Rudolph and his team, to attend a public hanging of six to twelve prisoners accused of sabotage. By March 1945, production had stopped due to a lack of parts and Rudolph and his staff were moved to Oberammergau where they met von Braun and others from Peenemünde. They finally surrendered to the U.S. Army and were transported to Garmisch. Recruitment into services of Allied powers and move to United States Rudolph was transferred to the British to participate in Operation Backfire from July to October 1945. He was then transferred back to the Americans. The U.S. Army picked up Martha and Marianne Rudolph from Stepfershausen before it was occupied by the Red Army and the Rudolphs were reunited at Camp Overcast near Landshut. In November 1945, Operation Overcast brought Rudolph, von Braun and the rest of the V-2 team temporarily to the US for six months. Overcast was renamed Operation Paperclip in March 1946 and formally approved by President Truman in August 1946 and most of the group stayed permanently. After a brief interrogation at Fort Strong, the team was sent to White Sands Proving Grounds to work on further V-2 engineering in January 1946. In January 1947 Rudolph was moved to the Ordnance Research and Development Division at Fort Bliss, El Paso, Texas, where his family finally joined him in April. Since he had been brought into the US without a visa, he and others were sent to Juárez, Mexico where he obtained a visa and officially immigrated to the U.S. on April 14, 1949. During his time at Fort Bliss, he acted as a liaison to the Solar Aircraft Company, and spent much of 1947 and 1949 in San Diego, California. During a 1949 inquiry by the FBI, Rudolph made the following statement on his participation in the Nazi party: Until 1930 I sympathized with