HEADS-UP U.S. Army Specialist Allen Cauble, right, watches as U.S. Army Pvt. 2 Shawnee Tapia prepares to fire a 120mm mortar from B-53 during the 8th Squadron, 1st Cavalry Regiment mortar crew's certification, Fort Lewis, Wash., May 30, 2008. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 238342-L-HDZ14-754.jpg Photo Gallery