Scientists remove Hunley's rear hatch

This photo provided by Friends of the Hunley shows conservators Paul Mardikian, left, and Philippe DeVivies removing the rear hatch on the Confederate submarine H.L. Hunley on Tuesday, Sept. 12, 2006, in Charleston, S.C. After it was removed from the sub the hatch was taken to the lab for X-rays. The 40-foot, hand-cranked sub, the first in history to sink an enemy warship, sank off Charleston after sending the Union blockade ship Housatonic to the bottom on Feb. 17, 1864. (AP Photo/Friends of the Hunley)

(AP) -- Scientists on Tuesday removed the rear hatch on the Confederate submarine H.L. Hunley, although the work won't immediately remove the questions surrounding the sinking of the sub in 1864.

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