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The five prime crewmen of the joint U.S.-USSR Apollo-Soyuz Test Project mission are photographed in the Flight Crew Training Facility, Building 35, at the Johnson Space Center during ASTP crew training activity. They are, left to right, astronaut Donald K. Slayton, docking module pilot of the American crew; cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew; cosmonaut Aleksey A. Leonov, commander of the Soviet crew; astronaut Thomas P. Stafford, commander of the American crew; and astronaut Vance D. Brand, command module pilot of the American crew.