For the second time in less than a week a man with a gun engaged in a mass shooting. Flags lowered in memory of eight victims in Atlanta had not yet been raised when news broke of the newest outrage, 10 dead in Colorado. Tragedies like this have become so frequent that they cause scarcely a pause as America goes about its day. “Did you hear there was another shooting?” someone asks. Think about that for a moment: another shooting.