Where is Gate 6 relative to the bench where the bomb went off?
Don't know...pinging PKM.....she was there at the game and entered through gate 7!!!!! She may be able to answer this question.
They renumbered the gates when they did the addition. We used to go in gate 23 but now we go in Gate 7 which is on the NE corner of the stadium and one of the emergency exits. I am assuming that Gate 6 is on the north end zone. He blew up on a bench on the oval which would be a couple hundred yards from that gate maybe a little more.
There is usually a lot of people in that area even the game so him taking off wouldn't be that noticed -- probably figured he was late for something.