U.S. Air Force Capt. Michelle Tartaglia, 20th Dental Squadron general dentist, is prepped to donate blood at the Palmetto Chapel at Shaw Air Force Base, S.C., Dec. 8, 2014. Donors are encouraged to hydrate before donating blood. It takes approximately eight to 10 minutes to donate a pint of blood. (U.S. Air Force photo by Airman 1st Class Diana M. Cossaboom/Released)