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WORK IS underway in a South Carolina lab to remove encrustation from the hull of the Confederate submarine H.L. Hunley. Scientists say that after six months of work, about 70 percent of the encrusted sand, silt and rust from the outside of the first submarine in history to sink an enemy warship has been removed. Scientists hope that when the entire hull is revealed, it will provide the clues as to why the Hunley sank after sinking a Union blockade ship off Charleston, S.C., in 1864.

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After 150 years, Confederate submarine's hull revealed

NORTH CHARLESTON, S.C. — A century and a half after it sank and a decade and a half after it was raised, scientists are finally getting a look at the hull of the Confederate submarine H.L. Hunley. The Hunley was the first sub in history to sink an enemy warship.

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