I agree with both above.
One thing, and I admit that I may be naive, but why isn't sound used as a weapon?
Why not use very high pitched sound instead of bullets? I think this is an underused weapon. It doesn't kill (although could easily) but it immobilizes the enemy, and it does so even in hidden areas so (close) snipers affected too. Perfect for the Black Hawk rescue, since you just have to keep the enemy at bay for long enough to transfer injured. Another thing that is useful about it is, you don't run out of ammo. High pitched sound just requires an electronic source.
I must be missing something, but I suspect that it is too easy to defend against, or perhaps no way to aim the sound wave and it would affect our soldiers too...Still, can be used as a surprise weapon...
Or to set a perimeter, why not set a perimeter from the air, dropping sleeping gas or tear gas? Probably disperses too soon. Again, can only be used as a surprise weapon, but who cares? You are saving lives...