Master Sgt. Perry Link, 2nd Civil Engineer Squadron engineering flight superintendent, fires an M4 rifle during an individual movement techniques and unidentified explosive ordnance portion of a training exercise at Barksdale Air Force Base, Louisiana, May 20, 2021. Training operational skills such as land navigation, weapons assembly and individual movement techniques, the 2nd CES intensified the readiness of it’s engineers, allowing the unit to better adapt to changes in the national security environment and compete in the dynamic future of warfighting. (U.S. Air Force photo by Senior Airman Jacob B. Wrightsman)