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Ivor van Heerden, who was a leading whistle blower in the analysis of what went wrong after Katrina hit New Orleans, is suing Louisiana State University at Baton Rouge, charging that he was fired from his position at the university's hurricane research because of anger over his criticisms of the Army Corps of Engineers, The New Orleans Times-Picayune reported. LSU officials deny that he lost his position for that reason, but decline to discuss specifics, citing the confidentiality of employment matters.