North Korea’s weapons-grade plutonium stockpile has soared in the past two years.North Korea now has enough material to make 10 nuclear warheads, according to the latest military analysis by its southern neighbor.

The conclusion is based on Pyongyang’s estimated 50-kg stockpile of weapons-grade plutonium, and the reckoning that each warhead would require an average of 4 to 6 kg of nuclear material. Continue reading.