A night vision goggle view early in the morning of U.S. Army 1ST SGT. Michael Grinston, from Charlie Battery, 1ST Battalion, 7th Field Artillery Regiment, 1ST Infantry Division (ID). Sergeant Grinston monitors his position on the Global Postioning System (GPS) during a night patrol.is given the signal to move, during a night patrol. He aims his FNMI 5.56mm M249 Squad Automatic Weapon (SAW) on one knee. (U.S. Army PHOTO by PFC Elizabeth Erste) (Released)