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SGT Unit Supply Specialist
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Ultimately, the conclusion was that a ruptured breathing valve caused the men to die of decompression, which is the result of a sudden, large drop in air pressure, causing the air in your lungs to expand and tear the delicate tissue of the vital organs. Decompression also vaporizes the water in the soft tissues of your body, thus producing a certain amount of swelling. The continued leakage of gas and water vapor would lead to a dramatic cooling of the mouth and airways. The water and dissolved gas would create bubbles that impede blood flow.

After 60 seconds, blood circulation would come to a stop, your brain would be starved of oxygen, and you would fade into unconsciousness.

What the Soyuz 11 cosmonauts experienced in their final moments would not have been a painless end. The unexpected drop in pressure would have exposed them to the vacuum of space.

Although the official autopsies from the Burdenko Military Hospital remain classified, it is not difficult to surmise what symptoms they would have undergone. First, they would have felt an intense pain in their chest, abdomen, and head. Then their eardrums would have ruptured, and blood would have begun spilling out of their ears and mouths. During this, the men would have remained conscious for about 60 seconds.

With the men dead, Soyuz 11’s impeccable landing was completely automatic, as the capsule ran a programmed re-entry with no need for living pilots. Their deaths transpired 104 miles above the atmosphere, cementing their status as the only human beings to have ever died in space.
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SSG Samuel Kermon
SSG Samuel Kermon
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Sad end to gallant men. Space has no room for errors.
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SSgt Owner/Operator
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I was in Jr High when this all happened. A very sad outcome - possibly could have been avoided if they had been buttoned up 100% in their suits. IIRC.
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Lt Col Charlie Brown
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A painful way to die
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