U.S. Air Force Tech. Sgt. Giovanni Mateus, a 52nd Aircraft Maintenance Squadron crew chief, sprays defogging solution on an F-16 Fighting Falcon during Exercise Trident Juncture 18 at Kallax Air Base, Sweden, Nov. 5, 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)