By CALVIN WOODWARD, LAURIE KELLMAN and ASHRAF KHALIL, Associated Press WASHINGTON (AP) — George H. W. Bush was celebrated with high praise and loving humor Wednesday as the nation bade farewell to the man who was America's 41st president and the last to fight for the U.S. in wartime. Three former presidents looked on at Washington National Cathedral and a fourth — George W. Bush — prepared to eulogize