I noticed this on aircanada.com: "On May 17, 2016, Toronto Pearson is launching a new process for U.S.-bound passengers whereby Canadian Air Transport Security Authority (CATSA) screening will take place before U.S. Customs and Border Protection (US CBP) inspection."
I'm having trouble picturing how that would flow through the building. Did anyone go through T1 transborder today?
More information:
http://torontopearson.com/updates/#