North Korea says they are ready to cope with US hostility 'with nuclear weapons at any time'
N.Korea says improving nuclear weapons in "quality and quantity"
North Korea has said its main nuclear complex, which has been the source of fissile material used in the country's atomic weapons programme, was in full operation and said it was working to improve its nuclear weapons "in quality and quantity."
The director of the North's Atomic Energy Institute said in comments carried by the official KCNA news agency said the country was fully ready to cope with U.S. hostility with "nuclear weapons any time."
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