Soyuz 15
The Soviet space program continues with the launch of Soyuz 15, carrying cosmonauts Lev Dyomin and Gennadi Sarafanov. This is intended to be the second crew to occupy the Salyut 3 military space station, but spacecraft systems intended to automate the rendezvous and docking process fail. After manual dockings are attempted, the Soyuz vehicle is running low on fuel and the crew is recalled to Earth after only two days. (Trying to dodge questions about the nature of Salyut 3’s mission objectives, Soviet space authorities later claim that Soyuz 15 was never going to dock with the station.) No further crews are sent to board Salyut 3.