people keep saying they would have done this or that, but i think alot are failing to realize theres a big difference between a random guy running in with a gun and a planned attack. This was very thought out and lasted only minutes before they were gone.
Absolutely agree, yet if you have time and enough cover to shoot quality video of the attack (the guy on the roof) it is my opinion that you have time and the element of surprise to at least kill one of them and then get the hell outa there

