U.S. Air Force KC-135 Stratotankers from the 100th, 916th and 507th Air Refueling Wings arrive in Poland during BALTOPS 2015, June 5, 2015, at Powidz, Poland. BALTOPS is an annually recurring multinational exercise designed to enhance flexibility and interoperability, as well as demonstrate resolve of allied and partner forces to defend the Baltic region. (U.S Air Force photo by Senior Airman Michael Battles)