I was just there yesterday... no, not the one in Arlington. I was at the one in Athens, Greece. I took a few pictures of them... apparently you're allowed to get right up there with them as long as you don't do anything stupid next to them. They are definitely very well disciplined. I didn't see the changing of the guards, but I did see them march around up there.. it was a sight to say the least. Here are the pictures: Yup, that's an M1 Garand with a knife attached. That's pretty much the only reason I'm posting these pictures here.. I thought it was interesting that's what is the issued weapon.