This undated photo proved by Michigan Technological University shows an Iver 3 Autonomous Underwater Vehicle purchased by Enbridge Energy Partners for Michigan Technological University in Houghton, ... more 
This undated photo proved by Michigan Technological University shows an Iver 3 Autonomous Underwater Vehicle purchased by Enbridge Energy Partners for Michigan Technological University in Houghton, Mich. Michigan Tech's Great Lakes Research Center will use the device to conduct sonar inspections of Enbridge oil pipelines beneath the Straits of Mackinac. Some consider the pipes, laid in 1953, a symbol of the dangers lurking in the nation's sprawling web of buried oil and natural gas pipelines. (AP Photo/Michigan Technological University, Guy Meadows) less 
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Associated Press | Photo By Michigan Technological University, Guy Meadows
Mon, Mar 3, 2014 10:27 AM EST