U.S. Army Reserve Staff Sgt. Job Smith, a crew member assigned to B Company, 5th Battalion (General Support) Aviation, 159th Aviation Regiment, walks towards a CH-47 Chinook at Felker Army Air Field, Fort Eustis, Va., Nov. 18, 2015. The Joint Survival Air Mask rotary wing variant, a next generation gas mask, was tested on a Chinook to determine its effectiveness. (U.S. Air Force photo by Staff Sgt. Natasha Stannard)