[Focault's Pendulum]

They will be unarmed, their job is only to observe

I didn't see that in the article. Got another source?

[GeronL]

I assumed they would be unarmed (no ammo is still unarmed in my book) the same way many Guardsmen at the airports on 9-11 were, no ammo. Since their mission is just to observe, I would expect they will have no ammo or even a firearm.

Their main duties will likely be to assist the federal agencies.