Four KC-135s from the 100th Air Refueling Wing, England, and 434th Air Refueling Wing, Grissom Air Reserve Base, Indiana, land at Powidz Air Base, Poland, in preparation for exercise BALTOPS 2016, June 2, 2016. Four KC-135s from the 100th Air Refueling Wing, England, and 434th Air Refueling Wing, Grissom Air Reserve Base, Indiana, land at Powidz Air Base, Poland, in preparation for exercise BALTOPS 2016, June 2, 2016. Four KC-135s from the 100th Air Refueling Wing, England, and 434th Air Refueling Wing, Grissom Air Reserve Base, Indiana, land at Powidz Air Base, Poland, in preparation for exercise BALTOPS 2016, June 2, 2016. A 434th Air Refueling Wing KC-135 from Grissom Air Reserve Base, Indiana, that took off from Powidz Air Base, Poland, June 6, 2016, refuels Polish air force F-16s over the Baltic Sea during Baltic Operations (BALTOPS) 2016. (U.S. Air Force photo/Senior Airman Erin Babis)Master Sgt. Mike Morgan, 434th Air Refueling Wing boom operator, from Grissom Air Reserve Base, Indiana, refuels a Polish air force F-16 over the Baltic Sea during Baltic Operations (BALTOPS) 2016 from a KC-135 that took off from Powidz Air Base, Poland, June 6, 2016. (U.S. Air Force photo/Senior Airman Erin Babis)A 434th Air Refueling Wing KC-135 from Grissom Air Reserve Base, Indiana, that took off from Powidz Air Base, Poland, June 6, 2016, refuels Polish air force F-16s over the Baltic Sea during Baltic Operations (BALTOPS) 2016. (U.S. Air Force photo/Senior Airman Erin Babis)Airmen from the 31st Aircraft Maintenance Squadron prepare F-16 Fighting Falcons from the 31st Fighter Wing, Aviano Air Base, Italy, before a sortie during Aviation Detachment 16-3 at Lask Air Base, Poland, June 7, 2016.