This aerial photo shows the Industrial Canal Friday, after Isaac hit earlier in the week in New Orleans. Floodwaters from Hurricane Katrina broke through the flood wall, right, seven years ago, covering the Lower 9th Ward neighborhood.
Homeowners tie a ramp Friday as several feet of moving water surround houses built on stilts on the Jourdan River in Kiln, Miss.
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As the cleanup began Friday, an old debate grew more urgent: Is it worth billions of dollars to build better levees in areas that are sparsely populated and naturally flood-prone?