North Korea threatens to 'destroy first' U.S. strategic bomber landing in South Korea. North Korea: "U.S strategic weapons will naturally be the first target to be destroyed" U.s. military sent a nuclear-capable B-52 strategic bomber to South Korea this week. North Korean state news agency: "This is a deliberate provocation of nuclear war by the United States""The days when preemptive strikes were America's'monopoly' are a thing of the past," he said.