Most of you will have seen the posts around the fact that Biden's 21 gun salute was done at 8-10 second intervals instead of the usual 3 second intervals.
You might also have seen that this was filmed at Arlington Cemetary.
However, I have check both Trump's and BO's last inauguration and they both got their 21 gun, 3 second interval, salute #immediately# after the swearing in.
Biden got someone singing a song.
I'm not sure the logic holds up, it could still have been timed with the oath. No need to do it from Arlington.