Two U.S. Air Force B-52 Stratofortress aircraft assigned

Two U.S. Air Force B-52 Stratofortress aircraft assigned to the 96th Bomb Squadron, Barksdale Air Force Base, La., taxi at Nellis Air Force Base, Nev., March 7, 2014, during Red Flag 14-2. 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. (U.S. Air Force photo by Airman 1st Class Timothy Young/Released)