What happened, sleepy, was those two journalists were killed by the US military, and Reuters wanted to know why. The US Military told them that they reviewed the footage and claimed that, while it was unfortunate that the photographers were killed, the soldiers had followed the Rules of Engagement and there was nothing to be done except offer condolences. Reuters invoked an act that forced the military to give them the footage for their review, and then an anonymous source within Reuters leaked the footage.

The footage contradicts what was told, and shows a side of the soldiers that typically isn't seen by the public. Because of that, the military wanted to cover it up so they wouldn't get bad publicity. Even if it's not the case, the masses see one example of a population and assume that it applies to everyone, so in this case, if I were to apply my opinion of that chopper gunner to the US military, it would be my belief that they're all trigger happy sadists that just want to shoot people, innocent civilians included. However, I'm more sensible than that and realize that this was a one-off tragedy and feel that those directly involved should be reprimanded, and measures taken to make sure the probability of this happening again is reduced (eliminated is unrealistic, we're human and shit will happen).