According to the BBC[1], while North Korea has successfully detonated five times, it is exponentially more difficult to get the package small enough to fit on a

According to the BBC[1], while North Korea has successfully detonated five times, it is exponentially more difficult to get the package small enough to fit on a missile. [1] - http://www.bbc.com/news/world-asia-pacific-11813699 http://www.bbc.com/news/world-asia-pacific-11813699