You could outfit the front steps with crewed machine guns, but apparently they only do that if they expect people protesting in favor of liberal values.
You really believe the security of those windows in the Capitol comes down to the glass? That you're even willing to accept this proposition says something.
Anyways, to my point, clearly observable in that picture are security shutters, on the sides of the window, left open and unlocked. I might have closed and locked those.
