North Korea doing its Part toward Non-Proliferation

It’s been my impression that it is the policy of North Korea to scrape together all the loose fissionable material to found around the world, and when they have enough scrounged up for a critical mass, to make it into a bomb and blow it up. This seems like a useful service to the world. The interval between bombs had been three years (2006, 2009, 2012, 2016), but the latest came less than a year after the previous and released a larger yield.