U.S. Air Force Senior Airman Keith Libby, 379th Expeditionary Medical Group combat medical technician, gets a flash of blood as he readies the intravenously injected saline solution into his patient during a training exercise Nov. 14, 2012. When a needle is successfully inserted into a vein a “flash” of blood will enter the tubing. Libby is deployed from Joint Base Langley-Eustis, Va., and is a native of Apple Valley, Calif. (U.S. Air Force photo/Senior Airman Joel Mease/Released)