You're right! Plus, I found an Easter Egg! The black civilian SUVs are FBI SUVs! If you look at the lights on the grill and on the back windsheild, you can tell.
There's one under a tree on the street by the terrorists' house, there's one under a roof by the limos (need a crane to lift), 2 in the limos, 2 on the top floor, and 3 (I think...) under some debree that can be lifted with a firemen. Hope it helps!
Well just look at the server origin. There's a little thing that says where they're from. If it says EN, US, or even UK than they're prpbably English. If it says DE or something else, then they're German or something.