Senior Airman Thriston Noel, 351st Air Refueling Squadron boom operator, goes over the pre-flight check list for a KC-135R Stratotanker during BALTOPS exercise at Powidz Air Base, Poland, June 7, 2017. The exercise, is designed to enhance flexibility and interoperability, to strengthen combined response capabilities, as well as demonstrate resolve among Allied and Partner Nations' forces to ensure stability in, and if necessary defend, the Baltic Sea region. (U.S. Air Force photo by Staff Sgt. Jonathan Snyder)