DYESS AIR FORCE BASE, Texas -- Debbi Chance, cilivian lab technician, looks for the difference in white and red blood cells in a sample slide at the 7th Medical Group, March 10, 2008. Lab technicians also check the platelet count level to make sure they are not low. (U.S. Air Force photo by SrA Courtney Richardson)

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Photo by: SrA Courtney Richardson |  VIRIN: 080310-F-2300R-008.JPG