This is an interesting documentary from Nova. Though its mostly explaining how a lack of communications between US National Security Agencies allowed 9/11 to happen right under there noses, it also shows (in great detail!), much of what is now being talked about today.
The interesting thing, is that this video came out a few years back.
This NSA Prism scandal (if you want to call it that) is not new news. Its just that no one paid any attention before the events of this week.
Open your eyes, folks!