What were some of the joint space programs the US and the Soviets were working on for the space race?

During the space race, the US and the Soviet Union collaborated on several joint space programs, most notably the Apollo-Soyuz Test Project in 1972. This mission marked the first international space flight, where an American Apollo spacecraft docked with a Soviet Soyuz spacecraft, allowing for crew exchange and joint scientific experiments. Additionally, both nations engaged in discussions about potential future collaborations on space exploration, although many of these ideas did not come to fruition during the height of the Cold War.