Staff Sgt. Adrienne Antonios uses a microscope to check a fluid sample for blood. U.S. Air Force Staff Sgt. Adrienne Antonios, a 4th Medical Operations Squadron medical lab technician, uses a microscope to check a fluid sample for blood at Seymour Johnson Air Force Base, N.C., on Jan. 5, 2010. Medical laboratory technicians process and perform analytical procedures on blood, urine and other body fluids daily. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 761360-U-PEY62-678.jpg Photo Gallery