Senior Airman Biak Sang, a 959th Clinical Support Squadron histology technician, preps a block tissue sample for testing at the San Antonio Military Medical Center, Joint Base San Antonio-Fort Sam Houston, Jan. 13, 2017. The pathology lab is part of the 959th Medical Group, the third largest medical group in the Air Force Medical Service. The group is fully integrated with Army and civilian personnel at SAMMC, supporting operations at a 425-bed facility and the only Level 1 Trauma Center in the Department of Defense (U.S. Air Force photo/Staff Sgt. Jerilyn Quintanilla)