NEW ORLEANS- Seamen Apprentice Robert Robinson, a crewmember of the Coast Guard Cutter Pamlico, helps wreck a structure on the Mississippi River near New Orleans, July 25, 2012. The Pamlico's primary mission is to build or rebuild aids to navigation used by mariners to safely navigate the inland waters of the United States. U.S. Coast Guard photo by Petty Officer 3rd Class Ryan Tippets.