A former secretary at Ellington Air Force Base is challenging the legitimacy of documents used to discredit President Bush's service in the Texas Air National Guard, saying the records are probably fake because she never typed them. Marian Carr Knox, 86, former secretary to Lt. Col. Jerry Killian, worked at the Houston air base from 1956 to 1979. She is now retired. "They're forgeries as far as I'm concerned because I didn't type them," Knox said Tuesday at her southwest Houston home. She said she typed all of Killian's memoranda and office letters during the time Bush served under him...