To detect and protect
Master Sgt. Robert Randall, 509th Civil Engineer Squadron, takes a gas mask fit test at the 509th Medical Operations Squadron Bioenvironmental Center at Whiteman Air Force Base, Mo., Oct. 3, 2012. Bioenvironmental not only performs fit tests, but also water samples, noise assessments, air sampling and health risk assessments. (U.S. Air Force photo/Heidi Hunt) (Released)