I would just add the cost of not doing this. As the threat increases, we see potential adversaries making significant investments in military technology, hypersonic weapons and the like, which increasingly put our continent at risk. If we take a look, we see that potential adversaries consider the United States and Canada as one integrated target set, so given the capabilities that are out there, including for the use of conventional cruise missiles and hypersonics, it is not inconceivable that we could easily be under threat.
As our north opens up and our sovereignty may at some time come into question, we have to be able to respond up there as well, so the costs of not doing this are something that weighs heavily.