Vladislav Volkov
Vladislav Nikolayevich Volkov was a Soviet cosmonaut who flew on the Soyuz 7 and Soyuz 11 missions. The second mission terminated fatally. Volkov and the two other crew members were asphyxiated on reentry, the only three people to have died in outer space.
50 years ago, cosmonauts Georgi Dobrovolsky, Vladislav Volkov and Viktor Patsayev became the first (and so far only) humans to die in space when their cabin depressurized. Recovery crews found the trio dead in their seats, with blue patches on their faces and blood dripping from their ears and noses