MOODY AIR FORCE BASE, Ga. -- Airman 1st Class Janese Jacobs, 23rd Aero-Medical Dental Squadron bio-environmental technician, monitors breathing for Staff Sgt. Jason Trapp, 23rd Logistics Readiness Squadron material management craftsman, during a gas-mask fitting here July 23 . Airman Jacobs tests gas masks for biochemical warfare by putting Airmen through different types of breathing techniques to ensure the mask is mission ready. (U.S. Air Force photo by Airman Joshua Green)