Students in a basic SWAT course prepare to enter a building with simulated hostiles inside, Aug. 3, 2017, at Seymour Johnson Air Force Base, N.C. To neutralize the threats, the students used simunition, which are realistic and non-lethal force-on-force, short range, training rounds filled with paint. (U.S. Air Force photo by Airman 1st Class Kenneth Boyton)