Before ISIS: A history of beheadings to terrify, punish

Watch Video IVETTE FELICIANO: In rapid succession, ISIS’ recent beheadings of American journalists James Foley, Steven Sotloff and British aid worker David Haines shocked and outraged the public, and prompted an American military response. PRESIDENT BARACK OBAMA: If you threaten America, you will find no safe haven. IVETTE FELICIANO: And now another British aid worker, Alan Henning, has suffered