Lebanon is still in shock after explosions of pagers and walkie-talkies killed dozens and injured thousands of people this week. So is the region heading for a wider war? We hear from the former Israeli Prime Minister, Ehud Olmert. Also on the programme: Sarah Gillis of Space X describes what it was like to take a violin into space; and how the entire human genome has been stored on a crystal. ( Pic: Mourners attend the funeral of Hezbollah member. Credit : Reuters