I respect Col. North, but he's way off here. I am the age of many early Viet Vets and I still shoot long-range varmit shots well beyond what's being done in these terror shootings. Age is not a measure of shooting skills involved in this situation. Experience, savvy and knowledge are far more important.
However, so much time has gone by that if someone from vietnam era was going to go on a shooting spree you would have thought it would have happened way before this.