主播大秀

US trade partners have threatened retaliation if US President Donald Trump presses ahead with his plan for steep global duties on metals.
The rhetoric ramped up as Mr Trump tweeted that "trade wars are good".
Plus, we hear from Mr Trump's Treasury Secretary Steven Mnuchin.
Also on the programme, four young African innovators share their solutions to some everyday problems.

Presenter Fergus Nicoll with guest Peter Ryan in Sydney.