A U.S. Soldier assigned to the 73rd Transportation Floating Craft Company of the 19th Transportation Battalion, 7th Transportation Brigade (Expeditionary), dons a gas mask during a field training exercise at Fort A.P. Hill, Va., Jan. 12, 2016. The training area featured a combination of wooded and open areas, consisting of moderately level terrain with open fields bordered by dense to light vegetation areas, which provided a varied training experience. (U.S. Air Force photo by Senior Airman Breonna Veal)