New Orleans Mayor Ray Nagin said on Wednesday he was shocked by video showing U.S. President George W. Bush being told the day before Hurricane Katrina hit that the city's protective levees could fail. The tape contradicts the president's statement four days after the hurricane struck: "I don't think anyone anticipated the breach of the levees." "It surprises me that if there was that kind of awareness, why was the response so slow?" said Nagin, whose city was devastated when the storm struck on August 29 and sparked massive flooding. "I have kind of a sinking feeling right now in...