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The nuclear weapon that North Korea intends to detonate in an underground test is big enough to kill up to 200,000 people were it ever to be used against a city such as Seoul or Tokyo, Russian military experts have revealed in an interview with The Daily Telegraph.
The weapon, with the same 20-kiloton yield as the bomb dropped on Nagasaki, is about 10ft long and weighs four tons, the experts were quoted as saying. It is too big to fit on to any missile Kim Jong Il
