In this photo made June 16, 2013, and provided by Great Lakes Exploation Group, diver Jim Nowka of Great Lakes Exploration Group inspects a wooden beam extending from the floor of Lake Michigan that ... more 
In this photo made June 16, 2013, and provided by Great Lakes Exploation Group, diver Jim Nowka of Great Lakes Exploration Group inspects a wooden beam extending from the floor of Lake Michigan that experts believe may be part of the Griffin, a ship that sank in 1679. Crews are digging a pit at the base of the beam to see if it's attached to a buried ship. (AP Photo/David J. Ruck, Great Lakes Exploration Group) less 
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Associated Press | Photo By David J. Ruck, Great Lakes Exploration Group
Mon, Jun 17, 2013 6:53 PM EDT