Glad to learn that Freeland is able to comprehend the inherent threat to Canadian territory should the war resume. The USA is at war with North Korea and has been since 1950, that's 67 years. Time to end the war by restarting it? 

The prudent approach is to wait and see. If the 4 delivery systems are launched and target US territory, it is a gross breach of the peace which nullifies the truce entered into 64 years ago. Then fire will rain on Kim's regime and its people. Likely millions will perish and contamination will make refugees out of most survivors. That's all we need. If China can't bring Kim to heel, Trump will sign a document that ends the truce and restores hostilities .
Ultimately, it is only China that can preempt any further provocations. Sadly, we can't rely on China remaining neutral  for long when Moa signed a deal that protected the North from the South and its allies, mainly the USA. It was Chinese soldiers that buttressed the North and brought us to this quagmire.