Yes. Im angsty about the Americans but joint interceptions have been happening since WW2 between us.

This is nothing out of the usual but Trumps posture certainly should have us rethinking this. We already know this line of thought of relying on America has met its rhetorical end of the road.

Some CBC readers have raised concerns that Canada wouldn't have been able to take action against it had the balloon been a threat.

Not an issue, according to Bercuson. He says one of the main points of NORAD is that Canadian and U.S. military aircraft need not seek permission every time they need to fly over each other's territory.

"So once the decision was made that this thing would be shot down," he said, "if we didn't have the capability of doing it, the Americans would do it."

• https://www.cbc.ca/news/canada/spy-balloon-canada-norad-questions-1.6742695