U.S. Navy Seaman Calvin Koffman, Portsmouth Naval Center hospitalman, takes the blood pressure of John Meyers, Air Combat Command training manager, during a blood drive at Langley Air Force Base, Va., June 12, 2012. The Armed Forces Blood Program has a local station at Portsmouth Naval Medical Center, which provides mobile centers to surrounding bases. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins/Released)