Air Force Master Sgt. Maria Teresa Pineda and other special operations recruiters carry a large bag filled with sand during a class that allows recruiters to experience the 350th Battlefield Airman Training Squadron preparatory course at Joint Base San Antonio-Lackland in San Antonio, Texas, June 28, 2018. The ruck march and sand bag carry began at 2 a.m. and is one of the many challenges presented by the squadron to help recruiters understand what their recruits endure. DoD photo by EJ Hersom