I agree with brp. 70 min for a T3-T3 is not that bad. I've done it several times. Just make sure your carry on luggage is good to go. I've been pulled aside for the mouth wash in an amenity kit I received on the plane. I had not opened the kit and put it in one of my bags. Took an extra 15 minutes to get thru security. Little things like that can make a big difference if time is tight due to your inbound being a little late.