The burn unit at the U.S. Army Institute of Surgical Research in San Antonio, Texas, is hot. Sometimes, it gets up to 102 degrees in there, among the patients.
People with severe burns can't regulate their own body temperatures well, so the air has to keep them warm.
"We see a lot of gruesome stuff," says physical therapist Melissa Boddington. At the height of the fighting in Iraq and Afghanistan, more than 1,000 wounded service members were flown to the hospital.