Green Screen Soldiers advance through a smoke screen during live-fire training at the Joint Readiness Training Center in Fort Polk, La., July 25, 2016. The soldiers are assigned to the New York Army National Guard's Company C, 1st Battalion, 69th Infantry Regiment. Army National Guard photo by Sgt. Harley Jelis SHARE: Download: Full Size (1.09 MB) Credit: Sgt. Harley Jelis VIRIN: 160725-Z-AR422-288C.JPG Photo Gallery