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An Airman performs the final set of checks during Transportation Isolation System, or TIS, training while practicing patient care in a containment unit at Joint Base Charleston, S.C., March 5, 2019. Engineered and implemented after the Ebola virus outbreak in 2014, the TIS is an enclosure the Department of Defense can use to safely transport patients with highly contagious diseases. (U.S. Air Force photo by Senior Airman Cody R. Miller)