Seaman Mathew King, a mineman assigned to the Navy Munitions Command Atlantic Unit, Charleston, S.C., screws on a lid to an inert MK 62 mine at Ellsworth Air Force Base, S.D., July 20, 2016. Upon impact, the tip will split and pull on a lanyard connected to a pin to start the arming process. (U.S. Air Force photo by Airman 1st Class Sadie Colbert)