Medical laboratory measures microorganisms
U.S. Air Force Tech. Sgt. Rowena Main, 18th Medical Support Squadron NCO in charge of microbiology, shows elementary students bacteria samples on Kadena Air Base, Japan, March 14, 2013. The students conducted a science project where they grew bacteria cultures in their classroom, with the assistance of the medical laboratory. (U.S. Air Force photo/Airman 1st Class Keith A. James)