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APOLLO-SOYUZ Test Project49
The final launch of a Saturn rocket came on July 15, 1975, as part of the Apollo-Soyuz Test Project. Earlier that day, a Russian Soyuz spacecraft lifted off its launchpad at a Soviet launch site carrying three cosmonauts. Seven and one-half hours later, the U.S. Apollo spacecraft was launched with its crew of American astronauts. Rendezvous and docking of the two ships were accomplished on July 17. The two ships remained docked for 2 days, conducting joint experiments and exchanging national mementos.