The joint Apollo-Soyuz mission sent three U.S astronauts into space aboard an Apollo spacecraft that docked in orbit with with a Soviet-made Soyuz vehicle. When the commanders of the 2 crafts officially greeted, their "handshake in space" served to symbolize the gradual improvement of U.S- Soviet relations (1 ene 1975 año – 31 dic 1975 año)
Añadido al timeline:
fecha:
1 ene 1975 año
31 dic 1975 año
~ 12 months