U.S. describes the move as as `` unpardonable provocation '' Heavy bombers taking part in U.S.-South North Korea exercises . Foal Eagle : As for the B-52s , they have been in the U.S. arsenal since 1955 . Missions show `` North Korea commitment to the security of our allies and partners '' B-52s flying from base on North Korea .
U.S. describes the move as as `` unpardonable provocation '' Heavy bombers taking part in U.S.-South North Korea exercises . Foal Eagle : Missions show `` North Korea commitment to the security of our allies and partners '' B-52s flying from base on North Korea .