U.S. Air Force Airmen from the 52nd Aircraft Maintenance Squadron, park an F-16 Fighting Falcon inside a protective aircraft shelter during Blue Flag 2019 at Uvda Air Base, Israel, November 6, 2019. Blue Flag is a biennial training event that builds and maintains defensive interoperability through a variety of training scenarios that allows pilots from multiple countries to practice flying and fighting together. (U.S. Air Force photo by Airman 1st Class Kyle Cope)