This is a 5,200 word monograph illustrated with many unpublihed or rarely seen photos. The first international partnership in space wasn't the International Space Station and it wasn't the Shuttle-Mir series of missions which launched in 1994. The final flight of the Apollo program was the first spaceflight in which spacecraft from different nations docked in space. The primary purpose of the Apollo–Soyuz flight was as a symbol of the policy of détente that the United States and the Soviet Union were pursuing at the time. The agreement to go forward with the mission was signed at the 1972 Moscow Summit.The Apollo-Soyuz Test Project (ASTP) was the first international human spaceflight. On July 15, 1975, an Apollo spacecraft launched carrying a crew of three and docked two days later on July 17, with a Soyuz spacecraft and its crew of two.