We will be flying from Chicago Newfoundland the first week of October. I have a few questions as I have not flown to Canada. Do we go through Canadian customs in Chicago or when we land in Tronto? Do we have to go through security again in Tronto. Do they check our firearms again in Tronto? We have about a 2.25 hour layover in Tronto. Coming home I was told we go through US customs in Tronto.