Park Hyun. New Unilateral US Sanctions Target North Korean Banks // Hankyoreh. March 14, 2013.

Brannen Kate. North Korea Sparks Missile Defense Upgrade in Alaska // Politico. March 15, 2013; Phil Stewart, David Alexander. U. S. to Bolster Missile Defenses to Counter North Korea Threat: Hagel // Reuters. March 15, 2013.