U.S. Air Force Staff Sgt. London Dyer, 378th Expeditionary Civil Engineer Squadron HVAC technician, begins repairing a U.S. Army HVAC unit at Prince Sultan Air, Base, Kingdom of Saudi Arabia, April 28, 2020. With temperatures rising, troops in the U.S. Central Command area of responsibility must take preventative measures to combat the summer's intense heat conditions. (U.S. Air Force photo by Staff Sgt. Giovanni Sims)