Senior Airman Julian Austria, 374th Aerospace Medicine Squadron bioenvironmental engineering flight technician, simulates using a joint chemical agent detector during a training scenario at Yokota Air Base, Japan, Nov. 17, 2017. The JCAD helps responding personnel know the type of chemical agent while being able to set up a cordon around the hazardous area. (U.S. Air Force photo by Staff Sgt. David Owsianka)