"The damage has been very severe to our capabilities to carry out our mission," Goss told the Senate Intelligence Committee. He said a federal grand jury should be empaneled to determine "who is leaking this information."
"I use the words `very severe' intentionally. And I think the evidence will show that," Goss said.
He said not only have these revelations made it harder for the CIA to gather information, but they have made intelligence agencies in other countries mistrustful of their U.S. counterparts.
"I'm stunned to the quick when I get questions from my professional counterparts saying, `Mr. Goss, can't you Americans keep a secret?'" he said.
Goss cited a "disruption to our plans, things that we have under way." Some CIA sources and "assets" had been rendered "no longer viable or usable, or less effective by a large degree," he said.
"I also believe that there has been an erosion of the culture of secrecy and we're trying to reinstall that," Goss said.
"I've called in the FBI, the Department of Justice. It is my aim and it is my hope that we will witness a grand jury investigation with reporters present, being asked to reveal who is leaking this information," he said.