The Explorers' Club, № DCCCXXVII

Operation AXIOM: The Space Race—The 50th Anniversary of Soyuz 11, Part II
29 June 1971: The Soyuz 11 crew set a new spaceflight endurance record, twenty-two days, including surviving a fire aboard Salyut 1 on the eleventh day; after separation from the station, their Soyuz's air was vented into space & Dobrovolsky, Volkov, & Patsayev asphyxiated to death, while the capsule re-entered the atmosphere automatically; recovery forces found the three cosmonauts dead.

Commentary: Amongst other memorials to the Soyuz 11 trio, Georgy Dobrovolsky, Vladislav Volkov, & Viktor Patsayev are the namesakes of the craters Dobrovol'skiy, Volkov, & Patsaev on the far side of the Moon.

Bonus! Space Race Song o' the Day: The Soyuz 11 Disaster
The Phenomenauts, "Heroes" from For All Mankind (Space Cadet Mike Papa Whiskey)

Semper exploro.