US Shoots down falling Satellite

If you aren't aware, there was a US military satellite that malfunctioned shortly after deployment, and would eventually fall back into Earth. No one knew where it was going to land, so the US military thought it was best to just shoot it out of the sky.

Which they just did.

I've heard that the trajectory of the falling debris goes right into Canada. Some speculate that it might land in Vancouver.

Hopefully our neighbors have done some thorough research, and not have done something so irresponsible. If the debris does cause collateral damage, who's responsible?