Source: http://historical.ha.com.Heritage Auctions. License: All Rights Reserved.

The Apollo–Soyuz Test Project, in July 1975, was the first joint U.S.–Soviet space flight, and the last flight of an Apollo spacecraft. Its primary purpose was as a symbol of the policy of détente that the two superpowers were pursuing at the time, and marked the end of the Space Race between them that began in 1957.

(Found at space.kinja.com.)

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Source: http://historical.ha.com.License: All Rights Reserved.