Missile buddies

Iran and Nth Korea: Despite different world views, they see themselves having a common enemy, and fertile ground for collaboration.

"While media coverage on Iran-North Korea military cooperation has focused principally on technician exchanges between the two countries and nuclear cooperation, ballistic missile development has been the most consistent area of Tehran-Pyongyang technological cooperation since the Iran nuclear deal was signed in 2015."

https://thediplomat.com/2017/05/a-closer-look-at-iran-and-north-koreas-missile-cooperation/