Would you care to articulate your idea of a just response by the U.S.?
As has been pointed out, the arrest of terrorists seems not to have produced the desired result(the cessation of terrorist attacks) as of yet. The scenes of people dancing in the streets seems to indicate a support for terrorist activities.
First of all, people should crack open a world map and understand where that "middle east" is. Then, look at the places *where* people *are* cheering on the streets. Then, think for a second about why people would cheer at the death of innocent persons. As a very long-term measure against terrorism, just try to find out why people develop such an unbelievable hate against a nation, and try to do something against it. That won't silence those calling for retaliation, and it may take a very long time, but is definitely necessary to come to peace some day.
I am open to new ideas if you have anything to offer and I am looking forward to reading your thoughts on the matter.
Where I live, in an insigificant European country, there is a fundamental law in place that basically says that you can only be punished for what you have done. You can't be punished for jumping with joy when your hated mother-in-law has been stabbed by her husband. You can't be punished because your neighbour is dealing drugs. You can't be punished because your father or sister or grandson happens to be a murderer. And so on.
I may be wrong, but I believe this concept is known in the United States, and - please correct me if necessary - it does not only apply to US citizens, but humans in general (the arrest of Russian programmer Sklyarov for something his employer did in Russia that is perfectly legal there seems to indicate otherwise...but I digress).
Short-term: I don't know. Bombing Iraq for weeks and weeks didn't help much, except to drive the occupants out of Kuwait. It does not seem to be a very effective measure against "evil empires" and sometimes helps dictators stay in the saddle (consider Yugoslavia for another example).
So, it may be old-fashioned, but how about, get the perpetrators and punish them? I personally wouldn't even mind them being killed in a little fireworks spectacle, as long as it stays on reasonable scale - apparently it seems to be no problem to reconcile this with US laws. But don't kill people because "they" are "on the other side".
Don't kill the daughter because her father's neighbour is cheering at his mother-in-law's death. Punish the murderer instead.
Just an idea, I know it sounds a little far-fetched.
f.