KNOXVILLE, Tenn. (Sept. 9) - Al Gore helped airlift some 270 Katrina evacuees on two private charters from New Orleans, acting at the urging of a doctor who saved the life of the former vice president's son.Gore criticized the Bush administration's slow response to Katrina in a speech Friday in San Francisco, but refused to be interviewed about the mercy missions he financed and flew on Sept. 3 and 4. However, Dr. Anderson Spickard, who is Gore's personal physician and accompanied him on the flights, said: "Gore told me he wanted to do this because like all of us he...