FLORIDA’S MARJORY STONEMAN DOUGLAS HIGH SCHOOL: why we must arm teachers.

[T]he only real thing that gun confiscation has proven is that the increase of gun free zones in our society is also an increase in targets for people who never abide by laws on guns or anything else.

And it's important to reiterate: no one is thinking about requiring teachers to be armed; only allowing those who are willing - and trained - to do so if they wish.