The Presidential Salute is 4 guns and 21 shots in rapid succession.
Biden got 3 guns and a 10 second pause between shots fired.
Biden got the salute reserved for Foreign Dignitaries.
Now …. Are we to believe the military all of a sudden forgot which gun-salute to give an incoming President? I don’t think so.
The odds of that are near zero.
What we saw was a very clear sign.
There was some hussle and debate in the news that Trump did not want to pass the football and the codes, if I remember correctly.
It is a movie and they wanted that as many as possible get those hints and connect the dots.