Eleven years after the 9/11 attacks, there is new information on what the George W. Bush administration knew about al-Qaeda's plans. We learned after 9/11 that a presidential briefing paper in August 2001 was headlined "Bin Laden Determined to Strike in U.S." But Tuesday in the New York Times, investigative reporter Kurt Eichenwald says the White House received ominous warnings as early as May 2001.