The Almaz program was a military space program of the Soviet Union developed by space and rocketry company MIC JSC NPO Mashinostroyenia (NPOM). The rocket and space complex "Almaz" was comprised of an orbital manned space station, transport vehicle, reusable return vehicle (RRV) for three persons, and a cargo capsule returning high-altitude film images to the Earth. This space complex was successfully tested both on the ground and in space. Three crews of Soviet cosmonauts worked on the manned orbital space stations. The RRVs went through nine flight tests demonstrating their reusability with two RRVs having flown to orbit multiple times.