Assassination of Archduke Franz Ferdinand. On 28 June 1914 Archduke Franz Ferdinand and his wife toured Sarajevo in an open-topped car. Unbeknown to them seven young assassins were lying in wait, armed with bombs, pistols and cyanide. Dramatisations based on witness testimony trace a minute-by-minute account of the event that plunged Europe into war. Chuck Yeager's attempt to break the sound barrier is chronicled in another edition of the programme at the same time tomorrow