Where Did This Come From?

Ok...so there hasn't really been that much focus on school shootings since Columbine. So what the hell is going on this year? Three school shootings in the past week, and two more "gun in school" threats yesterday. Apparently 18 kids have died in school shootings since the beginning of school...and school started three weeks ago!! I don't know that I get it. Why do kids hurt other kids...or for that matter...why does anyone take the lives of innocent children? I don't think I'll ever understand why schools can't be safe anymore. That's all I'm gonna say...