Potus said change would be in JOINT chiefs of Staff. NOT chief of staff.
“I can give you a little hint: It will have to do with the Joint Chiefs of Staff and succession,” Trump said.
The screen did say AF1 to the side with data. Q0 was the call sign.
Go back a couple of breads and see where it said AF1 for yourself.
Bar codes didn't exist then.
Were not commercially used until the early 80's