Water begins to flow out of two outflow vents during a test by the U.S. Army Corps of Engineers at the 17th Street Canal in New Orleans, Monday, Aug. 27, 2007. The pumps are used to move water in the canal around closed floodgates. During a hurricane event the gates would be closed keeping water from entering the canals and overtopping the levees.
(Photo: AP Photo/Bill Haber)
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