<<Do you really think the building would have been constructed without provision for such a scenario? Before you ask, no, I don't have detailed knowledge, it's just common sense.>>
I sincerely hope that steps are now taken to provide greater security. At an establishment where I worked, which housed considerably more than the building referred to, the windows of the control rooms opened on to a public road about 40 feet away. When there was a major altercation at a place nearby the powers that be put heavy curtains on the windows as protection. At another place I worked the foyer was enclosed by glass doors and windows with a single security man present during night hours. Thankfully both buildings have now been demolished.