I learned from experience that vehicles lose torque the higher the elevation due to the thinning of oxygen. I think it was something like 30% per kilometer in elevation. That being said I'm sure there's a level where they can't drive anymore.

As a Canadian, I wouldn't cross that border at all. Let alone to revolt in a country I am not from. Asking people to start a revolution or other military adjacent actions in a foreign country is generally not a good concept at any time. Only way it should be allowed is when requesting aid against an invading force.

I'd like to hear more

No one is successful enough to be a billionaire. Accumulating that amount of wealth is not a result of hard work, it's a result of exploitation. Begrudge all billionaires