Master Sgt. Carlos Sanchez, an explosive ordnance disposal technician assigned to the 28th Civil Engineer Squadron, carries a wood board to construct a makeshift bridge during at the Leadership Reaction Course at Camp Rapid, Rapid City, South Dakota, June 14, 2017. The LRC training is designed to build teamwork and leadership skills through completing various obstacles. (U.S. Air Force photo by Airman 1st Class Thomas I. Karol)