Executive Order 12333
Feds call it ‘twelve triple three’ – Whistleblowers Say it’s the Heart of the Mass Spying Problem – ArsTechnica
Text of Executive Order 12333 – National Archives
Executive Order 12333 and the Golden Number – Alvaro Bedoya at Just Security
Executive Order 12333 on American Soil, and Other Tales from the FISA Frontier – Jonathan Mayer of Stanford University