Director of U.S. National Intelligence James Clapper says... he is confident that North Korea... and North Korea alone... was the culprit behind the devastating cyber attack on Sony Pictures last year.
This was during an interview with U.S. network PBS on Tuesday,... where he also reiterated that countering cyber threats is Washington's top priority in terms of national security.
Clapper, who flew to Pyongyang in November to secure the release of two American detainees, also said... he doesn't see change on the horizon for North Korea, although he did feel a slight optimism from the young people he saw there.