Realizing that no Federal or local agency will be able to do much of anything when Hurricane Gustav reaches New Orleans, Mayor Ray Nagin has initiated the mandatory evacuation of half the city's coastal parishes today. And he when he says get out, he means it. There will be no emergency centers and the Superdome will not be a scene of mass chaos and tragedy this time around-because it's going to be closed. More on the evacuation, and video of Nagin's scary-ass warning, after the jump.