Col. Chris Hall of the U.S. Army Corps of Engineers on Wednesday points to the damaged protection cell at Lock 27 on the Mississippi River. Barges are supposed to rub against the rock-filled steel cylinder to help align them for proper entry into the lock. As of Wednesday morning, nearly five dozen tugboats and more than 400 barges were caught up in the logjam, which comes amid the nation’s worst drought in decades. (Associated Press)
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