WASHINGTON (AP) — The chairman of the House Intelligence Committee said Thursday that terrorists are already changing their behavior based on information from leaks about classified U.S. data gathering programs, but he offered no details.
Rep. Mike Roger said it's part of the damage from disclosures by former National Security Agency contractor Edward Snowden of two NSA programs. The programs collect millions of telephone records and track foreign Internet activity on U.S. networks. Snowden fled to Hong Kong in May and has granted some interviews since then, saying he hopes to stay there and fight any charges that may yet be filed against him.
Later on Thursday, Sen. Saxby Chambliss of Georgia, the ranking Republican on the Senate Intelligence Committee, also said that enemies of the U.S. are changing tactics as a result of the disclosure.
Snowden's disclosures "are ultimately going to lead to us being less safe in America because bad guys will be able to figure out a way around some of the methods we use, and it's likely to cost lives down the road."
The ranking Democrat on the committee, Rep. C.A. Dutch Ruppersberger of Maryland, said he's concerned that Snowden fled to Hong Kong, a part of China, "a country that's cyberattacking us every single day." He said investigators were trying to determine if Snowden would seek protection from the Chinese government.
Rogers and Ruppersberger spoke to reporters after a closed committee briefing with the NSA's director, Gen. Keith Alexander, who said he hopes to declassify details of dozens of attacks disrupted by the programs. Alexander said officials don't want to "cause another terror attack by giving out too much information."
The disclosures raised privacy concerns as Americans — some of them members of Congress — learned for the first time the extent of surveillance powers granted by the secret Foreign Intelligence Surveillance Court to help U.S. intelligence and law enforcement agencies track terrorists.
Officials have thrown out widely varying numbers of the attacks they say the broad surveillance of Americans' phone and online usage has thwarted. On Wednesday, Alexander said dozens have been stopped. Ruppersberger said the surveillance "has thwarted 10 possible terrorist attacks," then amended that number to be in line with Alexander's statement. In the initial days after the disclosures of the programs, officials cited one case.
Two senators and longtime critics of the program challenged Alexander's claim Thursday.
"We have not yet seen any evidence showing that the NSA's dragnet collection of Americans' phone records has produced any uniquely valuable intelligence," Democratic Sens. Mark Udall and Ron Wyden, both members of the Senate Intelligence Committee, said in a statement. "All of the plots that he mentioned appear to have been identified using other collection methods."
Investigators have been trying to determine which facilities the 29-year-old Snowden visited during his intelligence career to decide how much classified data he had access to as a computer systems analyst for the NSA and earlier for the CIA, according to two congressional staffers. They spoke on condition of anonymity because they were not authorized to describe the investigation publicly.
"It's clear he attempted to go places he was not authorized to go," within the classified systems, Rogers said.
Snowden's access to secret programs is spurring lawmakers to consider imposing new limits on contractors who work in the intelligence field. The head of the Senate Intelligence Committee, Democrat Dianne Feinstein said Thursday that her committee would draft legislation to limit or prevent contractors from handling highly classified technical data.
Feinstein spoke after a closed-door briefing Thursday on the NSA leaks open to all senators, by officials including Alexander and Director of National Intelligence James Clapsper, and FBI Deputy Director Sean Joyce. Feinstein said 47 attended — almost half the Senate.
FBI Director Robert Mueller defended the programs in testimony to Congress on Thursday. In what is likely his final appearance as FBI director before the House Judiciary Committee, Mueller said that terrorists track leaked information "very, very closely" and that because of leaks "we lose our ability to get their communications" and "we are exceptionally vulnerable."
Rep. John Conyers of Michigan, the Judiciary Committee's ranking Democrat, said: "It's my fear that we are on the verge of becoming a surveillance state."