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...violation of the [[pen register]] provisions of the [[Foreign Intelligence Surveillance Act]] and (in some cases) the [[Fourth Amendment to the United States Const ...troversy concerning [[NSA warrantless surveillance controversy|warrantless surveillance of selected telephone calls]]; in that case they did confirm the existence

...ty Agency]] to spy directly on al Qaeda by initiating the [[NSA electronic surveillance program]]. Reports a the time indicate that an "apparently accidental" gli ...2=O'Neil | date=January 23, 2006}}</ref> part of the broader [[President's Surveillance Program]], the NSA is authorized by executive order to monitor [[telephone