'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.

Cameraman: Darren Conway

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