> Two US marines implicated in killing family in notorious Iraq war shooting, expert tells BBC

> "I saw that children were in the room kneeling down. I don't remember the exact number but only that it was a lot. I am trained to shoot two shots to the chest and two shots to the head and I followed my training,"

This is crazy.

What I don't understand - surely the US military not bringing these people to justice is intentional, but what is the reason? It's a stain on the brand of America, and what's the benefit?