The activities I authorized are reviewed approximately every 45 days. Each review is based on a fresh intelligence assessment of terrorist threats to the continuity of our government and the threat of catastrophic damage to our homeland. During each assessment, previous activities under the authorization are reviewed. The review includes approval by our nation's top legal officials, including the Attorney General and the Counsel to the President. I have reauthorized this program more than 30 times since the September the 11th attacks, and I intend to do so for as long as our nation faces a continuing threat from al Qaeda and related groups.

The NSA's activities under this authorization are thoroughly reviewed by the Justice Department and NSA's top legal officials, including NSA's general counsel and inspector general. Leaders in Congress have been briefed more than a dozen times on this authorization and the activities conducted under it. Intelligence officials involved in this activity also receive extensive training to ensure they perform their duties consistent with the letter and intent of the authorization.