'Holy grail' of shipwrecks found?

December 24, 2014 3:59 PM

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'Holy grail' of shipwrecks found?

Divers inspect a hole being dug beside a wooden beam jutting from the floor of Lake Michigan during a search for the Griffin. (AP Photo/Great Lakes Exploration Group, David J. Ruck)

There are thousands of shipwrecks at the bottom of the Great Lakes, but one of the very first full-sized ship to go down has been one of the hardest to find.

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