Nazi human experimentation

"A Jewish prisoner in a special chamber responds to changing air pressure during high-altitude experiments. For the benefit of the Luftwaffe, conditions simulating those found at 15,000 meters [49,000 ft] in altitude were created in an effort to determine if German pilots might survive at that height."

Nazi Germany conducted medical experiments on prisoners in its concentration camps mainly between 1942 and 1945. There were 15,754 documented victims, of various nationalities and ages, although the true number is believed to be more. About a quarter of documented victims were killed and survivors generally experienced severe permanent injuries.