Not only was there a 21-gun 3-sec-pause salute at Andrews, while Bidan got 7 guns with 9-sec-pause in a cemetery, there was an interesting number of flags for the podium. This snapshot is taken from the C-Span video of the event, probably still viewable on C-Span and youtube.

I confess my irritation at all this Q stuff and my desire to defend FR from it is growing to the point I was tempted to write “Sorry, I have not consumed enough Ovaltine to get my secret decoder ring yet, so I can’t decode these Proofs with a capital “P””
But no, I won’t go there. I am asking honestly what the number of flags and gun salutes and how many seconds between mean to you? Because I cannot wrap my mind around it.
Numerous media outlets reported Biden got the 21-gun at Arlington. I suppose Q followers will say that is fake news.
Whatever, Biden was duly sworn in as president. That is what matters.