H.L. HUNLEYExcavation of submarine complete The Associated Press CHARLESTON - The excavation of the Confederate submarine H.L. Hunley is complete, more than three years after the sub was raised from the Atlantic off the coast of Charleston. Scientists this week finished removing sediment from the ballast tanks of the sub after recovering a coil of waterlogged rope. They also recovered some tools from the crew compartment, which might indicate the crew had been making repairs the night the Hunley sank. A small wooden cask found in a ballast tank last month, once thought to be a chamber pot, is likely...