A KC-135 Stratotanker aircrew conducts pre-flight checks at RAF Mildenhall, England, March 11, 2019. The crew was involved in training 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 partners and other allies in the region. (U.S. Air Force photo by Airman 1st Class Brandon Esau)

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Photo by: Brandon Esau |  VIRIN: 190311-F-QO224-1016.JPG