bioenviromental gas mask
Senior Airman David Westbrook, 1st Special Operations Aeromedical Squadron bioenvironmental technician, fits a gas mask to Airman 1st Class Chance Barrino, 1st SOAMDS bioenvironmental technician, at Hurlburt Field, Fla., Jan. 21, 2013. Gas mask fit tests, water testing, ventilation monitoring, and hazardous material spill response are a few of the preventative health actions bioenvironmental provides to the base. (U.S. Air Force photo/Staff Sgt. Victoria Sneed)