Staff Sgt. Aaron Clark, 628th Civil Engineer Squadron explosive ordnance disposal technician, sets up the XRS-3 X-ray generator to identify any possible hazards of the backpack, which was simulating the suspect device during an exercise on Aug. 22, 2013 at Joint Base Charleston - Weapons Station, S.C. Once x-rays are taken, EOD technicians can verify what type of hazard they're facing. The scenario tested JB Charleston to perform their duties under heightened security conditions during a routine security exercise (U.S. Air Force photo/Tech. Sgt. Rasheen Douglas)