Gas Mask Army Spc. Jonathon Peterson checks the seal of his gas mask during the 2018 Best Warrior Competition at McCrady Training Center in Eastover, S.C., Jan. 29, 2018. Air Force photo by Airman First Class Gracie I. Lee SHARE: Download: Full Size (1.85 MB) Tags: Guard, Northcom, Northern Command, Soldiers, Army, training Credit: Airman First Class Gracie I. Lee VIRIN: 180129-F-LT717-004A.JPG Photo Gallery