Pohl's WVHA. Work on the prestigious wonder-weapon V1 and V2 projects remained bitterly contested between the SS and Speer's ministry. During the summer of 1944, control of the concentration camps was removed from Pohl's WVHA and executive power was instead given over to local HSSPF offices, which, according to Pohl, occurred for operational reasons. Speer's armaments ministry took over arms production without the intermediation of the WVHA in the application process for industrial firms seeking business with the Reich. Estimates provided by Pohl indicate that during the second half of 1944, there were upwards of 250,000 slaves working for private firms, another 170,000 working in underground factories and an additional 15,000 clearing rubble from the Allied bombing raids. In 1947, a detailed description showing the scale of the operation was given at the WVHA trials at Nuremberg. Evidence outlined how property and cash worth hundreds of millions of Reichsmarks was taken from the victims of Aktion Reinhard. It was collected from the detailed notes that had passed between SS and Police Leader Odilo Globocnik and Reichsführer-SS Heinrich Himmler during the operation to kill most of the Jews in the General Government. Organization Organizationally, the WVHA was made up of five main departments (): Amt A, Personnel—Finance, Law and Administration Amtsgruppe A, among other things, discharged the responsibility for financial matters of the SS, including those relating to its concentration camps. Amt B, Payroll and Supply Amtsgruppe B, among other things, was responsible for the supply of food and clothing for inmates of the concentration camps, and of food, uniforms, equipment, billets, and camp quarters for the members of the SS. Amt C, Buildings and Works Amtsgruppe C, among other things was charged with the construction and maintenance of houses, buildings, and structures of the SS, the German police, and of the concentration camps and prisoner of war camps. Amt D, Concentration Camps Amtsgruppe D, which prior to March 1942 was known as the Inspectorate of Concentration Camps, was responsible, among other things, for the administration of the concentration camps and of the concentration camp inmates. Amt W, Business—Economics Amtsgruppe W, among other things, was responsible for the operation and maintenance of various industrial, manufacturing, and service enterprises throughout Germany and the occupied countries. It was also responsible for providing clothing for concentration camp inmates. In the operation of the enterprises under its control, this Amtsgruppe employed many concentration camp inmates.