Kody Greeno, 28th Medical Group contractor, and Airman 1st Class John Stumpf, 28th Security Forces Squadron response force member, look at a weapon on display at the base Exchange as part of National Police Week at Ellsworth Air Force Base, S.D., May 17, 2016. Security personnel qualify with the M-4 rifle and M-9 handgun, while also undergoing a 65-day training course at Lackland Air Force Base, Texas, which teaches basic military police functions such as missile security, convoy actions and law enforcement. (U.S. Air Force photo by Airman 1st Class Denise M. Nevins/Released)