Maybe you have heard the story of how India got the Bomb with Canada’s inadvertent help. We sold India a nuclear reactor called CIRUS in 1954 on an explicit promise that the facility would only be used for peaceful purposes. When India astonished the world with its first nuke test in May 1974, having upgraded the fuel output from CIRUS, it duly announced that it had successfully created a Peaceful Nuclear Explosive. The permanent consequence was, for better or worse, a nuclear-armed Subcontinent.
This is old news to enthusiasts of Cold War history. Here’s the new news: it almost happened twice. Canadian technology was almost used by another country to break into the nuclear club.