'How much you can take 'Volunteers undergo Army medical research at Fort Knox in Kentucky, United States. Soldiers tested for their ability to adapt to hot temperatures. Soldiers carry bags and walk under high temperatures to prepare them for war conditions in deserts and humid jungles. They walk on a treadmill under high temperatures. The amount of liquid to be consumed by each one of them is determined by the medics. At night soldiers relax with temperatures lowered to 90 degrees. Tanks also examined for different climatic conditions. Men check the efficiency of Army clothing. Wire put up on the bodies of soldiers record body temperature. Men wearing clothes enter a cold room and get into sleeping bags. A man in another room observes the body temperatures. Tanks tested for weather efficiency. Men wear jackets and masks for protection against cold weather.
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