I´m a Brazillian and I´d like to say that you americans must react wih all you´ve got !
Nothing, absolutely nothing justifies these kind of actions. The palestinians are, of course, the first suspects. After all, the US left that last meeting together with Israel. The worst is that there are no civillians among them: they´re all ready to kill someone.
I´ve had enough of terrorists. It´s about time the entire world kill them all. Most secrect services know who are the worst ones. Today, it was the US. Tomorrow, it might be someone else.
Mr. Ronald Reagan faced situations like this under his administration. He killed a lot of terrorists and even Khadafi´s son in the middle of a lost desert ! Extreme situations demand extreme measures !
I´m sure all the Western world is shocked and I´d like to express my best wishes to the brave american people. I´m sure those towers will be up very soon again or even higher ones ! They didn´t mess only with you guys. Those towers belonged, in a way, to the entire world (I´ve seen them; they were just amazing). It´s like bombing the Egipt pyramids. They all show what the human beings are capable of.
Remember: if you think you should, nuke them ! You´ll be making a favor to the entire world.