Christian, I will go quickly on this one and hand it over to you.
I think it is that there are so many single points of failure. Without a lot of redundancy in terms of infrastructure, it means that whether it is a deliberate act of espionage or interference or a natural disaster, disruptions down south can happen in ways such that we would have alternate routes or alternate mechanisms for mitigating the associated risks.
We also need to think about extremes of weather and the winter and how, if an electric generator goes down, as it did in Puvirnituq and Pangnirtung a little more than a decade ago, that represents a very acute human security crisis. It is different; we have had ice storms in southern Canada, so I will not dismiss that either, but when you're dealing with -40°C and -50°C conditions, this takes on a whole different imperative, so I think that's partly it.
It's also thinking about what vulnerabilities exist in terms of polarization. What are the friction points within our democratic systems that adversaries may want to exploit? We want to make sure Canadians are protected so we can have those difficult democratic discussions among ourselves and know that they are not being influenced or manipulated by outsiders.