British troops advance during the battle of the Somme in this 1916 handout picture

Why does the assassination of Archduke Franz Ferdinand -- the event that lit the fuse of World War One 100 years ago Saturday -- still resonate so powerfully? Virtually nobody believes World War Three will be triggered by recent the military conflicts in Ukraine, Iraq or the China seas, yet many factors today mirror those that led to the catastrophe in Sarajevo on June 28, 1914.