U.S. Air Force Senior Airman Tamer Frost, a 52nd Aircraft Maintenance Squadron crew chief, sweeps slush and ice away from the F-16 Fighting Falcons on the flightline as part of Exercise Trident Juncture 18 at Kallax Air Base, Sweden, Oct. 31, 2018. This exercise takes place in Norway and the surrounding areas of the North Atlantic and the Baltic Sea, including Iceland and the airspace of Finland and Sweden. With more than 50,000 participants, this is the largest NATO exercise since 2002. (U.S. Air Force photo by Staff Sgt. Jonathan Snyder)