9/11 Mystery: NSA Files on Al Qaeda Attack Never Probed
Why didn't the commission investigating the devastating 2001 al Qaeda attacks thoroughly scrub the NSA’s files? Philip Shenon on the crucial records the government has never explored.
President Bush learned of the 2001 World Trade Center attacks while visiting Emma E. Booker Elementary School in Sarasota, Fla. (Doug Mills / AP Photo)
