Hanoijane,
Perhaps because the man with the RPG is taking a hell of a chance. Won't the rebels, in this case, need to get within range first of all? I think it is because they can't do that with the RPGs they've got, that Tornados, Rafales, Typhoons and F16s et al, are involved in the first place. Furthermore, I think we're seeing the modern fast jets here at the mere surface of there capabilities. If you will, like asking Gordon "phuque it" Ramsey to make you a Bacon Roll!
FB
