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A U.S. Air Force F-15E Strike Eagle aircraft assigned to the 391st Fighter Squadron sits on a flight line at Nellis Air Force Base, Nev., Jan. 30, 2014, before a night training mission during Red Flag 14-1.
Red Flag is an advanced aerial combat training exercise held four to six times a year to train pilots from the U.S., NATO and other allied countries for real combat situations. (DoD photo by Airman 1st Class Joshua Kleinholz, U.S. Air Force/Released). Original public domain image from Flickr
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