Onlookers watch Lake Pontachartrain, where restaurants were destroyed by Hurricane Katrina, as Isaac heads toward New Orleans, Tuesday, Aug. 28, 2012. The U.S. National Hurricane Center in Miami said Isaac became a Category 1 hurricane Tuesday with winds of 75 mph. It could get stronger by the time it&#39;s expected to reach the swampy coast of southeast Louisiana.  &#40;AP Photo&#47;Cheryl Gerber&#41; <span class=meta>(AP Photo&#47; CHERYL GERBER)</span>
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