June 29, 1971 –
When Soyuz 11 disengaged from the Salyut space station, cosmonauts Georgi Dobrovolsky, Vladislav Volkov and Viktor Patsayev were killed by a faulty pressurization valve on this date.
All the oxygen leaks out of the Soyuz cabin before Patsayev could close the valve by hand, and the crew was asphyxiated.
I hate when that happens.
And so it goes
The Haus of Dcaligari 