RIVERINE SQUADRON ONE U.S. Navy Petty Officer 1st Class Joshua Jackson, assigned to Riverine Squadron 1, mans the aft .50-caliber machine gun aboard a Riverine Assault Craft during training on the Cape Fear River, N.C., Sept. 8, 2006. SHARE: Download: Full Size (0.12 MB) Credit: VIRIN: 119757-X-ZLC19-553.jpg Photo Gallery