The White House dug in for a protracted political battle as new details emerged about a 1999 report to U.S. intelligence that predicted terrorists might try to fly airliners into government buildings. And the FBI learned in 1996 of similar planning by terrorists, according to The New York Times. The Times also says in its Saturday editions that the FBI had been aware for several years that Al Qaeda-linked men were training as pilots in the United States and elsewhere. The Washington Post said Saturday that a top-secret briefing memo presented to President Bush in 1998 focused on efforts by...