The mighty Mississippi, America's water highway, is dangerously low
In the middle of the shrunken Mississippi, a barge drags a giant metal-edged suction head along the riverbed to remove sediment from shipping lanes. The crew of the dustpan dredge Hurley has been working around-the-clock for months to deepen the channels so boats and barges can pass through. "We've worked almost nonstop since last fall, everywhere from New Orleans up to St. Louis" in Mi