Three years ago, after nine people were gunned down at a community college in Roseburg, Ore., we published a list of some of the other victims of mass shootings in the United States. “Our hope,“ we wrote, “is that we never become numb to these terrible, preventable events, but instead honor these victims by acting to prevent future shootings.”

Sadly — maddeningly — Congress has failed to do that. And the list has only gotten longer.