Edited USAF image of a CBRN (chemical, biological, radiological, and nuclear) training exercise.
Original caption: Members of the 89th Airlift Squadron train on CBRN defense techniques Oct. 4, 2014, while preparing for a training flight at Wright-Patterson Air Force Base, Ohio. CBRN stands for chemical, biological, radiological and nuclear defense and includes protective measures taken in situations involving those hazards. The protection procedures could also be used by flight crews active in the fight against Ebola. (U.S. Air Force photo/Frank Oliver)