Bonfils Blood Center Blood Drive
A needle is inserted into the arm of Airman 1st Class Michael William, 2nd Space Warning Squadron, Dec. 19, 2013, at the health and wellness center on Buckley Air Force Base, Colo. According to the American Red Cross, every two seconds someone in the U.S. needs blood. (U.S. Air Force photo by Senior Airman Marcy Copeland/Released)