Sunday, Sept. 11, 2005 12:39 a.m. EDT Ray Nagin: Flooded School Buses Not My Fault New Orleans Mayor Ray Nagin said Friday that it wasn't his fault city school buses weren't mobilized to facilitate the Hurricane Katrina evacuation he ordered. Appearing on NBC's "Dateline," Nagin was asked by host Stone Phillips: "What was mobilized? I mean were national guard troops in position. Were helicopters standing by? Were buses ready to take people away?" "No. None of that," the Big Easy mayor replied. "Why is that?" an incredulous Phillips asked. Nagin replied: "I dont know. That is question for somebody else."...