Salyut 2 (OPS-1) ( meaning Salute 2) was a Soviet space station which was launched in 1973 as part of the Salyut programme. It was the first Almaz military space station to fly. Within two weeks of launch the station had lost attitude control and depressurised, leaving it unusable. It decayed from orbit by 28 May 1973, without any crews having visited it.