On August 22, 1946, the director of the Central Intelligence Group (CIG), Lt. Gen. Hoyt Vandenberg, wrote a Top Secret memo to President Truman, perhaps based in part on information from Doolittle and Sarnoff. Vandenberg stated that the "weight of evidence pointed to Peenemünde as origin of the missiles, that US MA attaché in Moscow had been told by 'key Swedish Air Officer' that radar course-plotting had led to conclusion that Peenemünde was the launch site. CIG speculates that the missiles are extended-range developments of V-1 being aimed for the Gulf of Bothnia for test purposes and do not overfly Swedish territory specifically for intimidation; self-destruct by small demolition charge or burning".