NSA Inspector General Joel Brenner and NSA Acting General Counsel Vito Potenza, "were conducting a review of their agency's two-year-old special surveillance program." They knew how it worked, but "did not know why exactly the Bush administration believed all this was legal." When they went to Addington's office to read the opinion this was the response: "'This is none of your business!' Addington exploded. 'This is the president's program!'...'If NSA lawyers had seen the NSA opinions, they would have cried foul, because the opinions were incompetent in areas the NSA lawyers knew everything about,' an official said."