Apollo-Soyuz Program Patch 
Apollo Soyuz Crew Patch
Apollo-Soyuz Goals
Apollo Soyuz was the first international manned spaceflight. It was designed to test the compatibility of rendezvous and docking systems for American and Soviet spacecraft, to open the way for international space rescue as well as future joint manned flights. (The Russians prefer to refer to it as Soyuz-Apollo).
The Flight of the Apollo Soyuz Test Project
July 15-24, 1975
Apollo Crew : Thomas P. Stafford, Vance D. Brand, Donald K. Slayton
Soyuz Crew: Valeriy Nikolayevich Kubasov, Alexei Arhipovich Leonov
09 days, 07 hours, 28 minutes
The Soyuz was launched just over seven hours prior to the launch of the Apollo CSM. Apollo then maneuvered to rendezvous and docking 52 hours after the Soyuz launch. The Apollo and Soyuz crews conducted a variety of experiments over a two-day period. After separation, Apollo remained in space an additional 6 days. Soyuz returned to Earth approximately 43 hours after separation.