Army Sgt. Matthew Eldridge preps “boot banger,” a water disrupting charge, for a vehicle exercise during the first 20th Support Command's competition for Explosive Ordnance Disposal Team of the Year on Fort Knox, Ky., Aug. 14, 2012. Eldridge is assigned to the 22nd Chemical Battalion, Aberdeen Proving Ground, Md. Army Sgt. Matthew Eldridge preps “boot banger,” a water disrupting charge, for a vehicle exercise during the first 20th Support Command's competition for Explosive Ordnance Disposal Team of the Year on Fort Knox, Ky., Aug. 14, 2012. Eldridge is assigned to the 22nd Chemical Battalion, Aberdeen Proving Ground, Md. SHARE: Download: Full Size (1.34 MB) Tags: Photo Essays Credit: VIRIN: 107656-B-PZS90-675.jpg Photo Gallery