U.S. Air Force Senior Airman Yoonhong Min, 633rd Aerospace Medicine Squadron bioenvironmental technician dons his gas mask during a joint radiological response training at Joint Base Langley-Eustis, Virginia, Oct. 3, 2018. A realistic scenario was set up, where a contractor had come across a suspicious item, and days later was hospitalized with simulated radiation burns and radiation poisoning. (U.S. Air Force photo by Airman 1st Class Anthony Nin Leclerec)