MEASURING UP U.S. Navy Petty Officer 3rd Class Clifton Ammons steadies a leveling rod to ensure the ground is level on Forward Operating Base Geronimo in Helmand province's Nawa district, Afghanistan, Oct. 21, 2009. Ammons is assigned to Naval Mobile Construction Battalion 74 and working with Marines assigned to Headquarters and Service Company, 1st Battalion, 5th Marine Regiment. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 324284-E-GNO78-499.jpg Photo Gallery