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NASA space-flown Apollo medallion for the Apollo–Soyuz mission.
Apollo–Soyuz was the first crewed international space mission, carried out jointly by the United States and the Soviet Union in 1975. A United States Apollo capsule and a Soviet Union Soyuz capsule launched into orbit on July 15, and millions of people around the world watched on television two days later as the spacecraft docked and the two crews shook hands through the hatch. The project was a symbol of détente between the two superpowers during the Cold War, and it is generally considered to mark the end of the Space Race, which had begun in 1957 with the Soviet Union's launch of Sputnik 1.Credit: Robbins Company for NASA; photographed by Heritage Auctions