Soyuz 24

Soyuz 24 (Russian: Союз 24, Union 24) was a February, 1977, Soviet mission to the Salyut 5 space station, the third and final mission to the station, the last purely military crew for the Soviets and the final mission to a military Salyut. The cosmonauts Viktor Gorbatko and Yuri Glazkov re-activated the station after toxic fumes had apparently terminated the mission of Soyuz 21, the previous crew. They performed biological and materials experiments while on board. Other presumed activities included photographic reconnaissance, and finishing tasks the previous crew was forced to abandon when their mission abruptly ended. The Soyuz 24 crew landed after spending 18 days in space, and the Salyut station was de-orbited six months later.