Most recent reports say that the Canadian troops were precisely where they were supposed to be, in a designated training area, and that everyone knew it...apparently except for the pilot. He was specifically told that he wasn't clear to fire and did so anyway.

There will undoubtably be a hearing followed by a court martial, and I'd be surprised if he (or she...I haven't heard one way or the other) isn't kicked out unless there is information we haven't heard yet. His failure to follow orders is rather different from Mr. Calley, whose deliberate acts resulted in him being stripped of his rank and sentenced to 25 years in a US military prison...the politicians later got that reduced to time already served.