U.S. Air Force Staff Sgt. Shannon Nations, 100th Aircraft Maintenance Squadron flying crew chief, inspects landing gear of a KC-135 Stratotanker from RAF Mildenhall after landing in Bucharest for refueling training with Romanian air force F-16s in Bucharest, Romania, March 11, 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)