NASA
During the Space Race, the Soviets had designed their own spacecraft to fly to the Moon. Their spacecraft was called Soyuz. The Soviets never landed on the Moon, they had too many problems. Instead, they started creating small space stations. The Soyuz spacecraft is what they used to go to these space stations. US and Soviet Union were part of the Cold War. In order to make peace between Soviet Union and US, they decided they would dock an Apollo spacecraft to a Soyuz spacecraft in space. After docking, the crews performed experiments and learned about each other's cultures. Apollo–Soyuz was the last flight of the Apollo spacecraft. It has never been used since, and as of 2020, there are no plans for it to be used again.