U.S. Air Force Senior Airman Joshua, 355th Civil Engineer Squadron horizontal shop journeyman, guides a hook from an all-terrain crane to its storage position during the replacement of an Aircraft arresting system at Davis-Monthan Air Force Base, Ariz., March 28, 2015. The BAK-12 is an aircraft arresting system that’s purpose is to stop an aircraft by absorbing its momentum in an emergency landing due to battle damage, loss of hydraulics or aborted takeoff. (U.S. Air Force photo by Airman 1st Class Chris Massey/Released)