Senior Master Sgt. Matthew R. Hill, 94th Explosive Ordnance Disposal Flight superintendent and Master Sgt. Jason A. Mellor, explosive ordnance disposal examine fragments of a civil war era cannon ball Aug 2. The cannon ball was detonated and disposed of by the Dobbins EOD team after being discovered near Centennial Park, downtown Atlanta July 18. (U.S. Air Force photo/Don Peek)