Hong Kong leader issues fresh warning to protesters

Carrie Lam says violence during demonstrations would push Hong Kong "down a path of no return". Meanwhile protests are continuing for a fifth day at the city's busy airport - we speak to Martin Lee, a veteran legislator who has some advice for the government.

Also in the programme - rare good news: two Ebola treatments have proved highly effective; and an interview with the teenage climate change activist, Greta Thunberg who is about to sail to New York for a UN summit.

(Photo: Hong Kong"s Chief Executive Carrie Lam during a news conference, August 13, 2019. Credit: Thomas Peter/Reuters)