Bullets. You have to track the shit out of them. If you gave the guards at the War Memorial live ammo, it would be a complete clusterfuck. [...] What if the magazine fell out and the ammo sprayed all over the ground? Now the person guarding is presenting the image of a drunkard scrambling around for their car keys in the dark.
I'm sure Bennet Haselton could come up with some incredibly complicated system involving voice activation, queueing theory and fingerprint recognition to solve all that.
Or you could put another non-ceremonial guard.