Marine Muscle Marines position an M777 155mm howitzer during Fire Exercise 1-17 at Camp Lejeune, N.C., Jan. 26, 2017. The battalion-level exercise allows multiple batteries to train together to improve internal standard operating procedures. Marine Corps photo by Lance Cpl. Alexis C. Schneider SHARE: Download: Full Size (2.43 MB) Credit: Lance Cpl. Alexis Schneider VIRIN: 170126-M-GQ832-0052I.JPG Photo Gallery