Joseph Albert "Joe" Walker (20 February 1921--8 June 1966) was an American NASA test pilot, who in 1963, made two X- 15 Experimental rocket aircraft flights beyond the altitude of 100 kilometers-at the edge of outer space.
Joseph Albert "Joe" Walker (20 February 1921--8 June 1966) was an American NASA test pilot, and member of the U.S. Air Force Man In Space Soonest program. In 1963, he made two X- 15 Experimental rocket aircraft flights beyond the altitude of 100 kilometers-at the edge of outer space.