New Orleans Mayor Ray Nagin said in an obscenity-laced tirade on WWL radio last Thursday that the federal government should have sent “Greyhound buses” to evacuate his city. He said school buses were inadequate because they lack bathrooms. There was an Evacuation Plan, written in 2000 and updated since. It states that New Orleans should be evacuated at the Mayor’s order. He should declare that “48 hours in advance.” It also states he should use “public buses” including transit and school buses. One of the duties of any Mayor of New Orleans is to know his obligations under this Plan,...