"I don't think it's likely or probable, but if it's a 1-in-4 or 1-in-5 chance, that's too high," Brennan said at Fordham University in New York.
CIA head: NKorea months from perfecting nuclear capabilities →
"When the 1st customer denigrates that work, how then can the American people embrace the work and the mission of the intelligence community," Brennan said. "So there's a real disconnect there."
CIA Director says more agents being sent into field →