U.S. Air Force F-16 aircraft maintainers, assigned to the South Carolina Air National Guard’s 169th Fighter Wing, remove the right wing leading edge flap after the discovery of a damaged actuator on one of their F-16 Fighting Falcons during Arctic Challenge Exercise 2019 at Kallax Air Base, Sweden, May 23, 2019. The damage to the actuator and the leading edge flap will require a total wing replacement, a very complex repair normally accomplished at home station or at depot where parts and specialized tools and equipment are readily available. ACE 19 is a Nordic aviation exercise that provides realistic, scenario-based training to prepare forces for enemy defensive systems. U.S. forces are engaged, postured and ready to deter and defend in an increasingly complex security environment. (U.S. Air National Guard photo by Lt. Col. Brian Doyle)