New Orleans relied on floodwalls built by the Army Corps of Engineers, but faulty engineering and construction caused the walls to collapse. Now New Orleans knows what its forefathers knew: build high. See the story in the Times-Picayune Tuesday, October 24, 2006 or at http://www.nola.com/news/t-p/frontpage/index.ssf?/base/news-6/1161755730212810.xml&coll=1