Blood work
Staff Sgt. Toni Thompson and Senior Airman Michael Urena use a microscope to inspect blood cells for color and shape in the 354th Medical Group laboratory Mar. 11, 2010, Eielson Air Force Base, Alaska. Sergeant Thompson and Airman Urena are assigned to the 354th MDG. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)