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Tropical Storm Isaac Moves Towards New Orleans Exactly Seven Years After Katrina

August 27, 2012 at 12:00 AM EDT
Though storm warnings have been lifted for Tampa, Fla., the site for this week's Republican National Convention, four Gulf states, including Florida, have declared states of emergencies. With memories of Hurricane Katrina, those in Louisiana are not taking any chances as they brace for Isaac's arrival. Gwen Ifill reports.