Army Spc. David Andrews uses a hammer to lock a tire into place on an M119A3 howitzer during the preparation phase before participating in the Joint Readiness Training Center Rotation 18-07 at Fort Polk, La., May 1, 2018. The tire is removed to traverse the gun from a travel position to a towed configuration. Andrews is an assistant gunner assigned to the Georgia Army National Guard’s Alpha Battery, 118th Field Artillery. Army National Guard photo by Staff Sgt. R.J. Lannom Jr.