It is the nightmare scenario. Mass shootings have become a seemingly ever-more prominent backdrop to life in the United States. The recent shootings, in an elementary school in Uvalde, Texas, the racially motivated massacre in a Buffalo, N.Y. supermarket, and, closer to home, the attack at a church in Laguna Woods, have driven home that these kinds of tragedies can happen anywhere, to anyone, and for any reason. In their ruthlessness, hatred and seeming randomness, mass shootings strike at the heart of a society’s psyche. “Active shooters are the hardest to deal with because they are willing to die,” said…