I'm not saying start another war, regime change, or any of that. I'm just saying we need to make it a policy to shoot back for a minute and communicate the message that attacking us is bad. An argument could be made that the September 11 attacks might not have happened had we made a habit of shooting back during the previous years as embassy after embassy was attacked in the Middle East and Africa.
Yes, trajectory shows point of origin too... return fire would be appropriate