Pyongyang's propaganda machine flung new insults at the United States on Saturday.
It compared the U.S. mainland with a "boiled pumpkin," unable to endure an attack from a foreign foe, the state-run Korean Central News Agency reported.
North Korea, on the other hand, could sustain an offensive from the outside, the report said. It claimed the government had built shelters around the country "against any enemy nuclear and chemical weapons attack."