Before ISIS: A history of beheadings to terrify, punish PBS News Weekend(00)

Before ISIS: A history of beheadings to terrify, punish PBS News Weekend(00)

Image gallery: Beheaded Liveleak

Before ISIS: A history of beheadings to terrify, punish PBS News Weekend At least 40 babies, some beheaded, found by Israel soldiers in Hamas Video shows four men beheaded CNN