Climate change: millions protest worldwide

Worldwide demonstrations are held to protest global warming. We hear from the teenager behind the strike, Swedish campaigner Greta Thunberg. Also on the programme: A US Congressman tells us about the controversy surrounding a whistleblower being prevented from speaking; and the American gun manufacturer who is no longer producing its civilian semi-automatic rifles.

(Photo: Youths walk down Pennsylvania Avenue while participating in the Climate Strike March in Washington DC on 20 September 2019. Credit: EPA/ Michael Reynolds)