There is a second helicopter that experienced a 'hard landing' as well. The USA military isn't being smart about the number of soldiers in a helicopter at any given time. In emergency there may be no other choice, but, if this is common practice in Afghanistan, it isn't a good one.
Unless, an in depth investigation by the USA proves otherwise, this was a retaliatory strike against the USA over the death of bin Laden. This is bin Laden's replacement. What's his name? Aimen or whatever. Zwaheri. Whatever.
This was an inside job. My guess is that someone with knowledge as to whom was in that helicopter passed on that information to make an impression on the USA about their aggressive nature in the world. I mean it was an incredible operation. Every leader, regardless of terrorist network, is checking and rechecking their security. That's a given.
So. To believe that Pakistan ISI wasn't involved in this HAS TO BE PROVEN to be a bad assessment. Unless the actual person responsible for this can be clearly identified, then the operations there are in danger and it has to include a sovereign entity from somewhere. Someone who doesn't consider the FBI Most Wanted List a worry.
I look forward to a complete report from the USA military.