Wish someone could tell us whether or not the military salute indoors.
Its really not important. If we just step back for a minute and think logically...
1. Not all military members get a chance to serve in that capacity. A lot of vetting likely takes place
2, It's really not an option for them to "refuse to salute" any president.
3. If a military member assigned to that duty "refused to salute" any president, they would likely be a civilian shortly. The military doesn't have a lot of tolerance for personal feelings.
I'm just gonna side on the likely conclusion, this is a BS red herring