HOWITZER HOWL U.S. Army Spc. Christopher Rosario fires a C3 105mm howitzer during Exercise Southbound Trooper IX as Michael Habb, a bombardier from the Canadian 1st Field Artillery Regiment, 36 Canadian Brigade Group, observes on Fort Pickett, Va. Feb. 16, 2009. Rosario is assigned to the 55th Signal Company, Combat Camera. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 381401-X-QHO51-739.jpg Photo Gallery