Exclusive: North Korea 'secretly helped by Iran to gain nuclear weapons', British officials fear

Exclusive: North Korea 'secretly helped by Iran to gain nuclear weapons', British officials fear:
"North Korea’s sudden advancement in developing nuclear weapons may be due to secret support from Iran, British officials fear.
The Foreign Office is investigating whether “current and former nuclear states” helped Kim Jong-Un in his drive to mount nuclear warheads on missiles.
Senior Whitehall sources told The Sunday Telegraph it is not credible that North Korean scientists alone brought about the technological advances...