A global IT outage shocks the world

As the world wrestles with the most serious global IT outage ever experienced, we assess the immediate security risks and the effects on aviation. Then: as the Republican National Convention wraps up in Milwaukee, we analyse Donald Trump's 93-minute speech and we hear from Tel Aviv, where a Houthi drone appears to have penetrated Israel’s air defences. All that, plus the latest business news and an exploration of why Zurich is bidding goodbye to dreams of hosting Eurovision.  See omnystudio.com/listener for privacy information.