It’s almost the 20th anniversary of the Columbine massacre. Here’s what’s happening in Denver schools today.

More than a dozen school districts in Colorado are closed Wednesday after the FBI and local law enforcement warned of an 18-year-old white woman who is “armed and dangerous” in the Denver metropolitan area.

Sol Pais flew from Miami to Denver on Monday and “immediately” bought a pump action shotgun and ammunition, FBI Denver Special Agent In Charge Dean Phillips told reporters Tuesday evening.

Pais had “made some concerning comments in the past” and had an “infatuation” with the 1999 Columbine High School shooting and its perpetrators, Phillips said at the press conference. She was last seen in the foothills of Jefferson County, in the metro Denver area.

It’s good that authorities are protecting kids, but you know what? This is also insane.

A year ago, I wrote this for The Week:

Consider where mass shootings have taken place in America in recent years: schools, nightclubs, churches, concerts. And now, a gaming tournament. Two people were killed Sunday and a dozen others injured before the gunman — possibly a tournament participant — killed himself. Horrifyingly, the attack played out over a livestream, with the gunshots and agonized screams available for everybody to hear in real time.

There is no place where people gather in America that is safe from gun violence. In fact, large gatherings are becoming dangerous targets for the angry and unhinged. As that ugly realization slowly settles in, and gun advocates stand their ground in refusing any new regulations on the ability to possess and use weapons of death, there will only be one option for people concerned about their own safety and the safety of their loved ones: retreat from the public square.

We’ve now reached the stage where we’d rather close public schools entirely rather than take much of a step to restrict access to guns. It’s both a reasonable step and absolutely unreasonable. Guns are destroying community in America. This is is just the latest step.