A Finnish air force F-18 and a U.S. Air Force F-15C Eagle from the 173rd Fighter Wing, Oregon Air National Guard, return to Rissala Air Base, Finland following a sortie during a training exercise that is part of Operation Atlantic Resolve, May 10, 2016. Over the course of two weeks the Oregon Air National Guard will fly jointly with the Finnish air force to practice interoperability between the two forces. (U.S. Air National Guard photo by Tech. Sgt. Jefferson Thompson/released)