German rocket engineer who designed the first self-contained rocket missile. TLS, one page, 8 x 10.5, NASA letterhead, October 12, 1970. Von Braun turns down a speaking engagement. In part, 'I certainly wish that I could travel to Florida and speak to the student body. Unfortunately, however, my duties here at NASA are demanding and preclude my acceptance of many invitations.' In fine condition. RRAuction COA.