Apollo-SoyuzWith the 1972 agreement having resulted in the successful Apollo-Soyuz Test Project, the United States and the Soviet Union formally renew the Space Cooperation Agreement. As an immediate goal to build on Apollo-Soyuz, both countries hold tentative discussions about docking the American Space Shuttle (which, it is still assumed, will be in space before the 1970s are out) and a Soviet Salyut space station. Though the shuttle’s first flight is still being delayed, the biggest hurdle will prove to be international relations, specifically a renewed chilling of the Cold War thanks to the Soviet Union’s 1979 invasion of Afghanistan.