Someone has forgotten that many of the 9/11 terrorists came into the US from Canada. Pretty sure not having the Canadians helping to watch for more will be a good deterrent. Glad we've opted to not put qualified people in our government, who knows what someone with actual intelligence experience would have done?
Is that a criticism of Canadian border security, the rcmp, US border security, the fbi, …? Countries protect their own borders vs entry and their internal security. Who let them take flying lessons?