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Two American ASTP prime crewmen have a meal with the Soviet ASTP first (prime) crewmen during Apollo-Soyuz Test Project joint crew training at NASA's Johnson Space Center. The four are inside the Soyuz orbital module mock-up in Building 35. They are, left to right, astronaut Donald K. Slayton, docking module pilot of the American crew; cosmonaut Aleksey A. Leonov, commander of the Soviet crew; astronaut Thomas P. Stafford, commander of the American crew; and cosmonaut Valeriy N. Kubasov, engineer on the Soviet crew. The training session simulated activities on the second day in Earth orbit. During the actual mission the other American crewmen, astronaut Vance D. Brand, command module pilot, would be in the Command Module.