U.S. Air Force Staff Sgt. Joseph Pettrone, Army ranger and Pre-Ranger Assessment Course (Pre-RAC) instructor, teaches the students how to assemble and detonate a M18A1 claymore mine at Moody Air Force Base, Ga., April 22, 2019. This skill is a core task at Army Ranger School expects everyone to know when they arrive. The Pre-RAC teaches these skills to Airmen so they have an opportunity to practice skills many soldiers use on a regular basis. (U.S. Air Force photo by 1st. Lt. Faith Brodkorb)