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 Arabia's chief counterterrorism official. In late August, Nayef had survived an assassination attempt by an operative dispatched by the Yemeni branch of Al Qaeda who was pretending to turn himself in. The operative had tried to kill the Saudi prince by detonating a bomb on his body, but stumbled on his way into the prince's palace and blew himself up.

[...]

U.S. officials now suspect that Nayef's attempted assassin and Umar Farouk Abdulmutallab, the Nigerian suspect aboard the Northwest flight, had the same bomb maker in Yemen, intelligence experts tell NEWSWEEK. At the briefing for Brennan, Nayef was concerned because "he didn't think [U.S. officials] were paying enough attention" to the growing threat from Al Qaeda in Yemen, said a former U.S. intelligence official familiar with the briefing. (A senior Saudi official told NEWSWEEK Saturday that "we don't have any concerns that the U.S. government isn't sufficiently concerned about Yemen. In the latter part of the Bush administration and in this administration, the U.S. has been very focused on the dangers emanating from Yemen.")