Joseph A. Walker

Joseph Albert Walker was an American World War II pilot, experimental physicist, NASA test pilot, and astronaut. He was one of twelve pilots who flew the North American X-15, an experimental spaceplane jointly operated by the Air Force and NASA.

Biography from Launch Library 2.

• X-15 | Flight 91 — Pilot · Success · August 22, 1963
• X-15 | Flight 90 — Pilot · Success · July 19, 1963
• X-15 | Flight 77 — Pilot · Success · January 17, 1963