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CAPE CANAVERAL, Fla. – The Soviet and American crews for the July Apollo Soyuz Test Project [standing, center] addressed personnel assembled in a firing room at KSC on February 10. The crews for the joint manned space mission toured the Center during their three-day visit which also included inspection of ASTP equipment and facilities and a trip to Disney World. The first international crewed spaceflight was a joint U.S.-U.S.S.R. rendezvous and docking mission. The Apollo-Soyuz Test Project, or ASTP, took its name from the spacecraft employed: the American Apollo and the Soviet Soyuz. The three-man Apollo crew lifted off from Kennedy Space Center aboard a Saturn IB rocket on July 15, 1975, to link up with the Soyuz that had launched a few hours earlier. A cylindrical docking module served as an airlock between the two spacecraft for transfer of the crew members. Photo credit: NASA