FILE - In this Aug. 29, 2012 file photo, water flows out 

FILE - In this Aug. 29, 2012 file photo, water flows out of the new 17th Street Canal pumping station as Hurricane Isaac hits in New Orleans. By the time the next hurricane season starts in June 2013, New Orleans will take control of much of a revamped protection system of gates, walls and armored levees the Army Corps of Engineers has spent about $12 billion building. The corps has about $1 billion worth of work left. Engineers consider it a Rolls Royce of flood protection, comparable to systems in seaside European cities such as Venice and Rotterdam. (AP Photo/David J. Phillip, File)
Associated Press
FILE - In this Aug. 29, 2012 file photo, water flows out of the new 17th Street Canal pumping station as Hurricane Isaac hits in New Orleans. By the time the next hurricane season starts in June 2013, New Orleans will take control of much of a revamped protection system of gates, walls and armored levees the Army Corps of Engineers has spent about $12 billion building. The corps has about $1 billion worth of work left. Engineers consider it a Rolls Royce of flood protection, comparable to systems in seaside European cities such as Venice and Rotterdam. (AP Photo/David J. Phillip, File)
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