NSA and 911
One thing that really bugs me after watching this show is that it is quite obvious that the NSA was monitoring bin Laden and al-Qaeda, had their phone numbers, was monitoring bin Laden's personal cell phone purchased in New York, the al-Qaeda control center in Yemen, and the terrorists themselves here in the US. There is no way that the NSA did not know what was happening. NOVA answers that by alluding to the idea that the NSA had nobody in government that it could report those facts to.
Just how gullible does NOVA think its audience is? Of course the NSA has people in government that it reports to.