The National Security Agency has acknowledged in a new classified briefing that it does not need court authorization to listen to domestic phone calls.

Rep. Jerrold Nadler, a New York Democrat, disclosed this week that during a secret briefing to members of Congress, he was told that the contents of a phone call could be accessed "simply based on an analyst deciding that."

If the NSA wants "to listen to the phone," an analyst's decision is sufficient, without any other legal authorization required, Nadler said he learned. "I was rather startled," said Nadler, an attorney who serves on the House Judiciary committee.

Not only does this disclosure shed more light on how the NSA's formidable eavesdropping apparatus works domestically, it suggests the Justice Department has secretly interpreted federal surveillance law to permit thousands of low-ranking analysts to eavesdrop on phone calls.