13-M-47820001.pdf

RESEARCH AND ENGINEERING (S&TNF) - WASHINGTON 0 C MEMORANDUM FOR THE SECRETARY OF DEfENSE SUBJECT: National Aerospace Plane Program - ACTION MEMORANDUM (U) ¢ A National Aerospace Plane Technology Program, addressing a single stage-to-orbit vehicle, was recently briefed to me. I believe this program to be of such significance that we should brief you as soon as possible. The program encompasses the Air Force's Military Aeros~ace Plane concept, the DARPA Hypervelocity Vehicle program, and NASA s e...