Gas Mask Air Force Senior Airman Ruba Lugo puts on an M-50 gas mask during an aeromedical evacuation training mission from Joint Base McGuire-Dix-Lakehurst, N.J., to Joint Base Charleston, S.C., Dec. 15, 2017. Air Force photo by Master Sgt. Mark C. Olsen SHARE: Download: Full Size (7.47 MB) Tags: Air Force, Northcom, Northern Command, training, Airmen Credit: Master Sgt. Mark C. Olsen VIRIN: 171215-F-AL508-0090.JPG Photo Gallery