In what year did the mission, piloted by the seventh man in space, occur?
X-15 Flight 91: X-15 Flight 91 was a 1963 American manned mission, and the second and final flight in the program to achieve sub-orbital spaceflight—a flight over 100 km in altitude—which was previously achieved during Flight 90 a month earlier. X-15 Flight 91:  This mission was piloted by Joseph A. Walker on August 22, 1963, with the air-launch occurring from a modified Boeing B-52 Stratofortress support plane over Smith Ranch Dry Lake, Nevada, United States. X-15 Flight 91:  Walker piloted the X-15 to an altitude of 107.96 km and remained weightless for approximately five minutes. Joseph A. Walker: Joseph Albert "Joe" Walker (February 20, 1921 – June 8, 1966) flew the world's first two spaceplane flights in 1963, thereby becoming the United States' seventh man in space.
1963