This incident is only an episode, which will soon be reduced to a footnote in the history of this very long and comprehensive war.
One day, this tiny, infitessimal, insignificant, miniscule minority of extremist murderers will succeed on a scale that compels a serious and realistic response.
When we on the side of civilization no longer have to fight each other as much as the enemy of civilization, and recognize collectively that the status quo is no longer survivable, then truly appropriate action will be taken, and the war will be won and all this terror and killing will be an ugly memory.
I think this could happen in weeks, years, or decades, but it will happen, of that I am quite certain. I hope it does before Iran achieves nuclear missile capability, or Pakistan's arsenal falls into their hands. So far, we haven't done our next generation any favors by failing to respond forcefully to the threat.
The world has seen this movie before, but somewhere along the way has lost the plot.