On the flight deck of the USS Midway, the color guard was practicing for an event that was taking place in a day or two.
The Midway is a decommissioned aircraft carrier, docked in San Diego Harbor, serving as a museum. It's definitely worth a stop. You can tour the ship, above and below decks, on your own; and take a guided tour of the bridge area, which is too small to let people try to pack in by themselves.
I never did find out what exactly they were practicing for, but people were setting up for what looked like a pretty major event, and I think I heard someone say the Secretary of the Navy was going to be there, so it was probably to award medals or something.