Masked help
U.S. Air Force Senior Airman Amanda Johnson, 23rd a Aerospace Medical Squadron bioenvironmental engineering technician, helps an Airmen adjusts his gas mask while preparing for a training exercise at Moody Air Force Base, Ga., Sept. 14, 2011. Airmen in hazardous chemical environments are required to wear a protective suit, nitrile gloves and rubber boots to prevent contamination to any of the hazardous chemicals in the environment. (U.S. Air Force photo by Airman 1st Class Joshua Green)