Arne Duncan is getting a lot of heat for telling the truth.You heard me. Duncan said, "The best thing that happened to the education system in New Orleans was Hurricane Katrina. That education system was a disaster." Yep.Duncan, of course, did not point the finger at teachers' unions, the bloated bureaucracy, or any of the major causes, but the fact is that yes, without Hurricane Katrina, New Orleans could not have rebuilt its horrible school system on a charter school model. That model is already showing great success. But for a natural disaster, it would not have happened.There are many, many things to go after Arne Duncan for saying and doing. This is not one of them. Of course, how exactly can you blame Bush here? Duncan may be made to walk it back for that reason alone.