Express UK
North Korea is known to have spies operating all around the world.
They gather intelligence on foreign powers, and while working in neighbouring South Korea, work to undermine the government and its image.
As technology has advanced, Pyongyang has cultivated a vast and skilled network of hackers, some 6,000 of them targeting organisations around the world.
While foreign powers also have spies working against the North, it is far more difficult to penetrate the insular society in which few are allowed in and even fewer allowed out.