Vengeance is horrible. But we need to get rid of whoever did this. If that means killing the person or persons who were responsible for this or who helped this take place, then I think we need to kill them. We can't let people get away with something like this.

But yes, we should take care that we definitely know who we're going after, and we shouldn't bomb a whole country out of existence or something. We shouldn't respond to terrorism with terrorism. But we should respond with force, if we have to.