he fallout from Diefenbaker's decision was that many Canadian engineers migrated south and ended up involved in the US space program.
Without getting all conspiratorial in one's thinking, but with various 'programmes' coming to light by our good friends in Virginia from back in the day, perhaps certain things happened to that very aim, i.e brilliant engineers migrated from both Canada and the UK to become involved (for remuneration) in the US aircraft and space programmes ?