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Georgi Timofeyevich Dobrovolski (born June 1 1928 in Odessa, died June 30 1971) was a Soviet cosmonaut who flew on the Soyuz 11 mission and had the unfortunate distinction of being part of the first acknowledged Soviet crew to die during a space flight.
After a normal re-entry, the capsule was opened and the crew was found dead. It was discovered that a valve had opened just prior to leaving orbit that had allowed the capsule's atmosphere to vent away into space, suffocating the crew.
