Reading between the lines, I get the impression this was an RPG attack, rather than missiles.
Reports that I've heard say it was just after take-off, you don't need the target that low for a missile. Also, they are now saying that the terrorists could have come across from Somalia, where RPG's are plentifull. I doubt that you could fire shoulder launched SAM's at such an undefended target and miss. Not the type of work usually associated with this crowd.
Thank god it did miss though.
