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The Apollo–Soyuz Test Project was the first joint U.S.–Soviet space flight, and the last flight of an Apollo spacecraft. Conducted between July 15 and July 24, 1975, the mission entailed the docking of an Apollo and Soyuz spacecraft, which allowed for both joint and separate scientific experiments; this included an engineered eclipse of the Sun by Apollo which allowed Soyuz to take photographs of the solar corona. Subsequent joint space flights included the Shuttle–Mir Program and the International Space Station.
Left to right: Deke Slayton, Thomas Stafford, Vance Brand, Alexey Leonov, and Valeri KubasovPhotograph: NASA; restoration: Adam Cuerden