U.S. Air Force Tech. Sgt. Bruce Davis, 527th Space Aggressor Squadron radio frequency transmission supervisor, shakes hands with Dr. Faiz Anwer, medical oncologist, at Banner-University Medical Center in Tucson, Ariz., July 2015. Anwer was the lead doctor during Davis’ bone marrow collection procedure, which was facilitated by the C.W. Bill Young Department of Defense Marrow Donor Program. (U.S. Air Force photo by Airman 1st Class Chris Drzazgowski/Released)