U.S. Air Force Senior Airman Corey Marion, 351st Air Refueling Squadron boom operator, goes over flight procedures with Romanian air force members aboard a KC-135 Stratotanker in Bucharest, Romania, March 13, 2019. The crew trained with Romanian air force F-16s over the skies of Romania, which enhanced regional capabilities to secure air sovereignty and promote peace and security through cooperation, collaboration, interoperability with NATO allies in the region. (U.S. Air Force photo by Airman 1st Class Brandon Esau)