Another "my workplace is different from yours" incident

[fauxklore]

It is quite common to see tour groups at the Pentagon. They're led by a military member in honor guard uniform, who walks backwards while giving his spiel. (There's another officer at the back, herding the stragglers.)

Yesterday, I was on my way to a meeting and I saw a Marine in honor guard uniform, doing that precise backwards walk and talking in a low voice. He didn't have a tour group with him, however, just a thick binder. It makes perfect sense, but I'd never realized before that they have to rehearse.