17/07/1975 Apollo 18 & Soyuz 19 make first US/USSR linkup in space
Apollo-Soyuz Test Project: "Mission of Apollo Soyuz" pt2-2 1975 NASA 14min
Apollo 18 Soyuz 19 docking (1975)
Acoplamento Apollo 18 e Soyuz 19
The mission included both joint and separate scientific experiments and provided useful engineering experience for future joint US–Russian space flights, such as the Shuttle-Mir Program and the International Space Station. ASTP was the last manned US space mission until the first Space Shuttle flight in April 1981.