Trump Tariffs Spark Trade War Fears

Key trading partners of the United States say they'll be forced to respond in kind, if President Trump follows through on his promise to introduce tariffs on steel and aluminium imports. Hear reaction from China, the EU and Turkey.

Also in the programme: British Prime Minister Theresa May outlines her key aims for Brexit; and scientists conclude there are five types of diabetes, not just two.

(Photo: A steel industry worker. Credit: Getty Images)