Exploring a U-Boat wreck off North Carolina 06:09. ... The deck gun can be made out, as can the sub’s conning tower, guarded by a school of grouper. You can even spot the periscope inside.

The U-550 is one of several World War II-era German U-boats that have been discovered off the U.S. coast, but it's the only one that went down in that area, Mazraani said.

On July 30, 1942, U-boat U-166 attacked the Robert E. Lee southeast of the mouth of the Mississippi. The passenger ship sank, taking 25 lives (404 survived). Claudius and his crew fought back with ...