Newsweek follows up its story on Obama being informed of a Christmas terror plot with the story that White House counterterrorism advisor John Brennan being briefed about the kind of bomb used during the holiday attack: White House counterterrorism adviser John Brennan was briefed in October on an assassination attempt by Al Qaeda that investigators now believe used the same underwear bombing technique as the Nigerian suspect who tried to blow up Northwest Airlines Flight 253 on Christmas Day, U.S. intelligence and administration officials tell NEWSWEEK.The briefing to Brennan was delivered at the White House by Muhammad bin Nayef, Saudi...