From left to right, Army Corps of Engineers Colonel Ed Fleming and U.S. Senator David Vitter listen as Louisiana Governor Bobby Jindal speaks to reporters while touring the new levee wall and pumps at the 17th Street Canal, built after Hurricane Katrina, as Hurricane Isaac approaches New Orleans, Tuesday, Aug. 28, 2012. The Category 1 hurricane is expected to hit New Orleans overnight....(AP Photo/Cheryl Gerber)