Well...beyond the question of whether this is accurate...if it is, we've simply got to wonder why these convoys are not more heavily guarded. These irregulars seem to have the ability to attack the soft targets in our supply train. That is, of course, the point of infiltration, but if you have a convoy that is a nice target it would seem that you'd put some choppers in the air around it and have some other air assets nearby to make life hell for the attackers. Or perhaps use phoney convoys as ambushes...or spend a little more effort sweeping the ground around your line of transit. Given that the enemy isn't trying to win a war in the conventional sense -- just trying to break our will to keep forces that far from home -- perhaps a little more effort to protect our soft targets in the hot zone wouldn't hurt.