U.S. Air Force Master Sgt. Daniel Young, 1st Aircraft Maintenance Squadron production superintendent, dons a gas mask and helmet during training at the combat arms training and maintenance range at Joint Base Langley-Eustis, Va., Jan. 23, 2018. Individuals train using gas masks to practice firing a weapon in the event that they need to shoot while in Mission Oriented Protective Posture gear. (U.S. Air Force photo by Airman 1st Class Tristan Biese)