Former NSA Director: 'An Attack Is Going To Come'

The former director of the U.S.'s National Security Agency, General Keith Alexander, warned Thursday that the NSA, mired in controversy over alleged overreach, will inevitably come under another kind of negative scrutiny when the next terrorist attack comes.

"I do think an attack is going to come and hit us or Europe," he told CNN's Christiane Amanpour in an exclusive interview. "And then people are going to swing this right around."