In this photo taken June 16, 2013, divers inspect a hole being dug beside a wooden beam jutting from the floor of Lake Michigan that an exploration group believes may have been part of the 17th ... more 
In this photo taken June 16, 2013, divers inspect a hole being dug beside a wooden beam jutting from the floor of Lake Michigan that an exploration group believes may have been part of the 17th century ship the Griffin. (AP Photo/Great Lakes Exploration Group, David J. Ruck) less 
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Associated Press | Photo By Great Lakes Exploration Group, David J. Ruck
Thu, Jun 20, 2013 4:55 PM EDT