It is not surprising that troubled adolescents who have no belief in God, have no moral compass and are capable of such acts. What is really troubling is that much of America has discarded religion and embraced neo pagan hedonistic debauchery. This will not be the last mass atrocity. The only practical deterrence will be teachers and other school personnel willing to carry concealed weapons. These shooters at their core are cowards and cower when confronted.
Why can we secure the airports and not the schools? Don’t give me the BS that they are just children. 5 pounds of trigger pull gets the job done most times.