SAULT STE. MARIE, Mich. — Heavy fog caused the U.S. Coast Guard to close the St. Marys River for several hours September 12, causing boats to back up at the Soo Locks. Here the Algoma Progress waits to enter the MacArthur Lock, while the Walter J. McCarthy waits for the Poe Lock, out of view behind the Algoma Progress is the American Courage. (U.S. Army Corps of Engineers photo by Michelle Hill)
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