'Do you feel guilty?' - Watch BBC reporter challenge smuggler as he follows lethal drugs trade

President Donald Trump sees his trade war as a way of pressuring Mexico to do more to stop the flow of illegal drugs into the US.

BBC correspondent Quentin Sommerville travelled to the US-Mexico border and tracked down fentanyl smugglers - before speaking to addicts in Philadelphia.

Watch as he meets some of the drug operatives and challenges them over the deaths their pills are causing.

Read more on this story here.

Cameraman: Darren Conway