Donald Rumsfeld
The United States was attacked on September 11, 2001 by al Qaeda terrorists who hijacked commercial airliners and crashed them in coordinated strikes into both towers of the World Trade Center in Lower Manhattan, New York City and the Pentagon in Washington, D.C. The fourth plane crashed into a field in Shanksville, Pennsylvania, and its target was likely a prominent building in Washington, D.C., most probably either the Capitol Building or the White House. Within three hours of the start of the first hijacking and two hours after American Airlines Flight 11 struck the World Trade Center, Rumsfeld raised the defense condition signaling of the United States offensive readiness to DEFCON 3, the highest it had been since the Arab-Israeli war in 1973.
Robert Baer
Baer wrote about the events of the September 11, 2001 terrorist attacks in "The Guardian" "[D]id bin Laden act alone, through his own al-Qaida network, in launching the attacks? About that I'm far more certain and emphatic: no." He later stated, "For the record, I don't believe that the World Trade Center was brought down by our own explosives, or that a rocket, rather than an airliner, hit the Pentagon. I spent a career in the CIA trying to orchestrate plots, wasn't all that good at it, and certainly couldn't carry off 9/11. Nor could the real pros I had the pleasure to work with."