Earlier this week, the appearance of an Iranian-style nosecone on a North Korean missile raised eyebrows all over the wonk-o-sphere. That the two countries cooperate in missile development is not exactly new news, but the images from Kim Il Sung Square gave eloquent testimony to this relationship.

But just how far does the technical collaboration extend? Is it confined to ballistic missiles, or is there a nuclear angle as well?

As it turns out, Iran and North Korea have signed a series of three-year plans for “cultural and scientific exchange.” KCNA has announced three of these, with the most recent signing taking place this past April in Pyongyang. The contents of the plans have not been publicized.