I not only read your article but I have read several articles. Your article conveniently doesn't mention anything about a checkpoint. However,
http://news.bbc.co.uk/1/shared/spl/h...far/html/1.stm
here to the right of the first picture it clearly states "checkpoint". So perhaps there is conflicting reports. Regardless, one may not have enough time to do all you stated in less than one second but it doesn't take a second for the brakelights to come on when the pedal is depressed. Neither article, either the one you posted or the one I refered to stated the speed of the oncoming car. I believe the oncoming speed would have had some factor. Nor does any report I've read say anything about what sounds anyone heard, with the exception of the link you provided, this also is another sense the soldiers relied on I'm quite sure. Did the car appear or sound like it was speeding up, continue at the same speed or was it slowing down? If the witnesses stated that the car was slowing or the brake lights was on when the soldiers fired then perhaps you would have some argument. In the article you posted it clearly states
"We have a car coming," someone called out as we entered an intersection. We could see the car about a 100 meters away. The car continued coming; I couldn't see it anymore from my perch but could hear its engine now, a high whine that sounded more like acceleration than slowing down. It was maybe 50 yards away now."
So the car was acclerating, not braking. One must take this into consideration, need I remind just the day before Baghdad had one of the worst days ever after 5 or more car bombs blew up all over the city.
Respectfully, I believe it is you that is being "EXTREMELY disingenuous" from the comfort of your armchair as you quarterback from half a world away. You are asking kids barely out of high school scared out of their minds who are responsible for not only their safety but the safety of their comrades to make a split second decision on who will die. Possibly him or one of his comrades or the person driving the car. Who sir would you choose? How would you react that would make this situation better?