 Despite the confusion, there was little doubt that the Germans were working on a rocket and in April 1943, the Chiefs of Staff warned operational HQs of the possibility of rocket weapons.Duncan Sandys was appointed by Winston Churchill to lead an inquiry to study the information and report on counter-measures.At a meeting, Sandys introduced the aerial photographs of Peenemünde and Professor Frederick Lindemann, scientific advisor to Churchill, judged the information to be a hoax but R. V. Jones refuted Lindemann.