Katrina
  • Isaac bore down on New Orleans, testing the city's new levee system.

    LAST UPDATE : Dec 05, 2012, 6:30 PM EST
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  • saac was on the verge of ballooning into a hurricane Tuesday that could flood the coasts of four states with storm surge and heavy rains on its way to New Orleans, where residents hunkered down behind levees fortified after Katrina struck seven years ago this week.

    LAST UPDATE : Dec 05, 2012, 4:00 PM EST
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