#237 Flash floods, Tunisian turmoil and rich racing

Are cities ready for a rise in extreme weather? Why has Tunisia’s president sacked the prime minister? And is the ‘most expensive race on earth’ worth the cash? Olly Mann and The Week delve behind the headlines and debate what really matters from the past seven days. With Felicity Capon, Suchandrika Chakrabarti and Abdulwahab Tahhan.