After the Charleston massacre, President Obama made this comment: “the unique mayhem that gun violence afflicts upon this nation.” The three worst public mass shootings and nine of the worst 13 public mass shootings occurred outside the US. Of these cases, nine occurred in developed or “advanced” countries. The worst public mass shooting are as follows: 1) Utoya, Norway, July 22, 2011: Anders Behring Breivik used a gun to kill 67 people and wound 110 others. Still others were killed by bombs that Breivik detonated. 2) Sousse, Tunisia, June 26, 2015: Seifeddine Rezgui, a college student, used a gun to...