Members of the White House panel reviewing government surveillance have publicly rejected some of the National Security Agency’s key claims in justifying warrantless, mass spying. Appearing before a Senate hearing, former CIA Deputy Director Michael Morell and former national security aide Richard Clarke refuted assertions the bulk collection of phone data could have prevented 9/11.

Michael Morell: “It is absolutely true that the 215 program has not played a significant role in disrupting any terrorist attacks to this point. That is a different statement than saying the program is not important.”

Richard Clarke: “If the information that the federal agencies had at the time had been shared among the agencies, then one of them, the FBI, could have gone to the FISA Court and could have, in a very timely manner, gotten a warrant to monitor the appropriate telephones. They didn’t because they were unaware of the information that existed elsewhere in the government at the time. But there was a period of over two years where that information was available.”

President Obama is expected to present his plan for reforming the NSA on Friday.