Gavin Grey: UK Correspondent on the European Union's resistance to Donald Trump's 'threats' and the scientists discovering what British dolphins are doing beneath the waves

The European Union's trade chief said the 27-member bloc is committed to securing a trade deal with the US based on "respect" not "threats". It comes after US President Donald Trump threatened to slap a 50% tariff on all goods sent to the US from the EU. UK Correspondent Gavin Grey talks to Ryan Bridge about the message, and the scientists turning their attention to dolphins.  LISTEN ABOVE. See omnystudio.com/listener for privacy information.