Capt. Chris Carr, 351st Air Refueling Squadron pilot, conducts a pre-flight check on a KC-135R Stratotanker during BALTOPS exercise at Powidz Air Base, Poland, June 6, 2017. 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. Participating nations include Belgium, Denmark, Estonia, Finland, France, Germany, Latvia, Lithuania, the Netherlands, Norway, Poland, Sweden, the United Kingdom, and the United States. (U.S. Air Force photo by Staff Sgt. Jonathan Snyder)