Martin Kaste, NPR /
Parts of Iowa are still underwater after days of heavy flooding. That means roads are closed and bridges are washed out, making simple transportation more difficult.
In some parts of the state, it seems almost every bridge is blocked by a National Guard Humvee. County roads are clogged with dump trucks full of sand destined for the levees.
The trucks are helping to shore up levees. The National Guard and volunteers have been working for days to build up a few feet of extra height, but the water is still seeping through.
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