“It was, ‘Huh, hello? What are we doing here?’” said Geoffrey Stone, a University of Chicago law professor, in an interview with NBC News. “The results were very thin.”

While Stone said the mass collection of telephone call records was a “logical program” from the NSA’s perspective, one question the White House panel was seeking to answer was whether it had actually stopped “any [terror attacks] that might have been really big.”

“We found none,” said Stone.