U.S. Air Force Airman 1st Class Conner Walsh, a 509th Civil Engineer Squadron explosive ordnance disposal team member, inspects the barrel’s bore on an HD2 robot at Whiteman Air Force Base, Mo., May 10, 2016. The robots must be inspected prior to and after each use to ensure there are no discrepancies. (U.S. Air Force photo by Airman 1st Class Keenan Berry)