[Airborne Butters]

The thing with cops, and not the London situation, is that they need to make split second decisions. It's easy to critisize the aftermath of such an effect when you don't have to make it.

As for the London thing, the guy ran and acted suspicious and due to the fact that they just had 2 very large bombs go off, they weren't taking any chances.

I guess as morbid as this sounds, shit happens and you deal with it/move on.