The M/V American Integrity as it transits the Duluth Ship Canal in Duluth, MN.  The American Integrity is one of the thirteen 1000' lake freighters that carry bulk cargo around the Great Lakes.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/9197427@N06">Pete Markham</a> from Loretto, USA
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/pmarkham/4773659996/">M/V American Integrity</a>