Flew on the Apollo-Soyuz Test Project (ASTP) sometimes known as Apollo
18 as the Docking Module Pilot with mission commander
Thomas P. Stafford
and command module pilot Vance Brand. The Soviet cosmonauts were 'Alexei
Leonov' (First man to walk in space) and
Valery Kubasov. The flight
lasted 9 days (July 15-24, 1975), was the last use of the Apollo era
hardware and the last American manned spaceflight until the launch of
the first reusable space shuttle in 1981.