The colourful "father" of Pakistan's nuclear bomb, Abdul Qadeer Khan, has claimed North Korea may have perfected a nuclear weapon and long-range missile warheads, according to Al Jazeera English.
Khan, a gifted scientist but shady individual, is believed to have sold nuclear technology to North Korea.
"No doubt they are quite capable and they can do it," Khan told the channel. "They can even build an [intercontinental ballistic missile] if they want to."
Khan admitted the North's missile technology is "crude" and "not as sophisticated as the western countries have. But sometimes a crude system will also work. It is good enough to frighten other people."