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.
It had to be this way, in part because the other side might do shit to mess up your plans. Or else we'd have had, as Pompeo said with a grin prior to the inauguration, "a smooth transition into the second term of President Trump." Which is why smart operators always have multiple layers of backup plans.