Captain Marcela Sancho, 932nd Officer in Charge of Nursing Operations, Aeromedical Staging Squadron, is issued a gas mask for a training exercise, at Scott Air Force Base, Il, June 16, 2014. Capt. Sancho is in charge of making sure that the medical technicians in the ASTS are certified in all the skill sets they are required to master for their jobs. (U.S. Air Force Photo/ Staff Sgt. Amber Hodges)