Defense Supply Center Richmond, Va., supplies the military with parts and supplies for reverse-osmosis water purification units like the one seen in use here by the Marine Corps during Operation Iraqi Freedom in 2003. U.S. Marine Corps photo by Master Sgt. Edward D. Kniery Defense Supply Center Richmond, Va., supplies the military with parts and supplies for reverse-osmosis water purification units like the one seen in use here by the Marine Corps during Operation Iraqi Freedom in 2003. U.S. Marine Corps photo by Master Sgt. Edward D. Kniery SHARE: Download: Full Size (0.6 MB) Credit: VIRIN: 396603-U-ZXU81-981.jpg Photo Gallery