XB-70

Front:
NASA 00 U.S. AIR FORCE 200

Back:
XB-70 The XB-70, the world's most exotic airplane, flew at three times the speed of sound. Al- though originally designed as a high-altitude supersonic bomber, it was used as a research aircraft until retired to the Air Force Museum in Feb., 1969. F-64 Pub. by Joseph F. Morsello, 405 Paper Mill Rd., Phila., Pa. 19118 PHOTOGRAPHING THE NATION S-78118-2