Senior Airman Chavette Hillard, 22nd Aerospace Medicine Squadron bioenvironmental engineering technician annotates ventilation measurements April 16, 2012, McConnell Air Force Base, Kan. Hillard is part of the administrative Airmen team that ensures the base ventilation systems are capturing the proper amount of contaminates in the air. It is the task of bioenvironmental engineers to ensure every work area is a safe one. (U.S. Air Force photo/Airman 1st Class Maurice Hodges)
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