Wedged into a secure, windowless basement room deep below the Capitol Visitors Center, U.S. District Court Judge John Bates appeared before dozens of senators last month for a highly unusual, top-secret briefing.
The lawmakers pressed Bates, according to people familiar with the session, to discuss the inner workings of the United States' clandestine terrorism surveillance tribunal, which Bates oversaw from 2006 until earlier this year.
Bates had rarely spoken of his sensitive work. He reluctantly agreed to appear at the behest of Senate Intelligence Committee Chairman Dianne Feinstein, who arranged the session after new disclosures that the court had granted the government broad access to millions of Americans' telephone and Internet communications.
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