US tornadoes : More than a 100 missing

More than a hundred people are still missing in Kentucky after tornadoes hit the US state. Is climate change to blame? We hear from a prominent American Climatologist. Also on the programme, why islanders on La Palma, in the Canaries, are still suffering the volcanic eruption that began three months ago; and a rare interview with Iran's ambassador to London, who's says it's once bitten, twice shy, when it comes to international negotiations. (Photo: Tornado torn Mayfield town water tank; Credit: REUTERS/Cheney Orr)