A pair of American B-52H bombers was escorted by two Japanese F-2 fighter aircraft and two South Korean KF-16 fighter jets during a trilateral flight on Friday.

North Korea, on Sunday, blasted recent combined air drills conducted by South Korea, the US and Japan, saying such joint military actions are "the main danger factors heightening the level of

It was the first time this year that a U.S. B-52H strategic bomber was deployed to the Korea n Peninsula for a drill, conduct ed to improve deterrence against North Korea ‘s increasing nuclear and missile threats, it said.