Behold! World's first submarine to sink an enemy warship

• Conservator Virginie Ternisien works at removing the encrustation from the hull of the Confederate submarine H.L. Hunley at a conservation lab in North Charleston, S.C., on Jan. 27, 2015. 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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