Policemen from the Ludlow police department approach a simulated hostile aircraft during an aircraft clearing exercise October 10, 2017 at Westover Air Reserve Base, Mass. The policemen practices aircraft clearing exercises on one of the C-5M Super Galaxies assigned to Westover. Practice of exercises like those performed keep participants prepared to handle hostile situations that could occur on an aircraft. (U.S. Air Force photos by Airman Hanna Smith)