U.S. Air Force Tech. Sgt. Charles Shewmaker, 633rd Civil Engineer Squadron Explosive Ordnance Disposal team lead, uses an X-ray to scan simulated explosive ordnances at Langley Air Force Base, Va., Oct. 14, 2015. In addition to detecting and identifying possible explosive ordnances, EOD technicians can support the U.S. Secret Service in protection of the president, vice president and other dignitaries. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)