U.S. Soldiers of 1st Battalion, 37th Field Artillery, 3rd Striker Brigade Combat Team, 2nd Infantry Division, fire rounds to calibrate an M777 Howitzer at Forward Operating Base Warhorse, Diyala province, Iraq, Dec. 8, 2009. (Photo by: Petty Officer 1st Class Eileen Kelly Fors) Date: 12.08.2009