U.S. Airmen discuss maintenance options prior to take-off for refueling training with Romanian air force F-16s in Bucharest, Romania, March 12, 2019. The crew was involved in training 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)