CAIRO (AP) - An audio message purported to come from Osama bin Laden endorses the failed attempt to blow up a U.S. airliner on
Christmas Day and threatens new attacks against the United States.
U.S. officials and several researchers who track terrorist groups say it may be an attempt to show bin Laden has command over al-Qaida offshoots. They say there's no evidence bin Laden had anything to do with the airline plot.
Meanwhile, the White House says the recording hasn't been authenticated yet.