Giving blood, saving life
U.S. Air Force Airman 1st Class Matthew Nguyen, 354th Aircraft Maintenance Unit avionics specialist, prepares to donate blood during a blood drive hosted by Davis-Monthan Air Force Base, Ariz., May 21, 2014. Sixty pints of blood were collected during the drive. (U.S. Air Force photo by Airman 1st Class Betty R. Chevalier/Released)