I just spent the last three hours watching two great episodes of the PBS program “Frontline” that deal with the history of the NSA surveillance program.
The first episode is a two-hour piece on the creation and development of the program from the time of 9/11/2001, to the inclusion that NSA actions still continue with Pres. Obama. It includes interviews with everyone (sans Bush/Cheney) and gives a detailed account of the history of the program.
The second episode of one hour contains a brief introduction to Edward Snowden and then the complicity by major tech corporations with the NSA and the FBI regarding electronic surveillance.
Plus the website has many complimentary information and interviews that I have yet to look into but look interesting. It is important and compelling viewing.