ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Mitchell Carrell, 28th Civil Engineer Squadron firefighter, takes a break after climbing an out-crop of rocks in the summer heat at Rapid Creek Trail Head, Rapid City, S.D., 16 June. To avoid overheating and heat stress, drink plenty of water and take breaks periodically when out in the summer heat. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)