Does US policing need an overhaul?

A federal judge in the American city of Denver has ordered police to stop the use of tear gas, plastic bullets and other non-lethal force on peaceful protesters. We discuss the relationship between prosecutors and police in the USA and how it can change. Also in the programme: The National Football League in the US has said players should be allowed to protest against racial discrimination - a dramatic reversal of policy. And, thousands of Australians have attended rallies across the country in support of the Black Lives Matter campaign. (Picture: Protesters gather in front of the Los Angeles Police Department. Credit: EPA/ETIENNE LAURENT)