That Gun Free Zones are the closest correlation to mass shootings? I knew it was hgher but I did not know it was so high. Well, according to NRO, it is.

Money quote:

“With just one single exception, the attack on congresswoman Gabrielle Giffords in Tucson in 2011, every public shooting since at least 1950 in the U.S. in which more than three people have been killed has taken place where citizens are not allowed to carry guns.”