WASHINGTON (AP) - Al-Qaida terrorists appear to be regrouping as a lethal threat with or without Osama bin Laden, congressional leaders said Sunday. Lawmakers cited recently publicized warnings from U.S. officials and a bin Laden spokesman to underscore the persistent danger from terrorists chased from their Afghan havens. They appear to be more capable of attacking Americans than they were a month or two ago, said Sen. Bob Graham, D-Fla., chairman of the Senate Intelligence Committee. He said bin Laden might be in Pakistan's western tribal lands. Added Sen. Richard Shelby of Alabama, the committee's top Republican, "They could hit...