Vandenberg CIG memo to Truman (22 Aug 1946).
official-recordgovernment_reportScandinavian "ghost rockets"
A Central Intelligence Group Top Secret memo from Lt. Gen. Hoyt Vandenberg to President Truman assessing that the 'weight of evidence' pointed to Peenemunde as the ghost rockets' probable origin.
The memo's existence and content are official-record; its Peenemunde conclusion is a competing-explanation that was never confirmed. Early evidence of US intelligence-community engagement with an aerial-anomaly wave.