Donald Trump won power with the promise of tackling illegal drug use in America, where more than 10,500 people died from heroin overdose in 2014. Heroin is a rapidly growing problem in the US and much of the supply comes from neighbouring Mexico, where more and more of the drug is being produced, according to White House figures.

Correspondent Ian Pannell. Filmed by Darren Conway, edited by Greg Brosnan.

Smack in America's suburbs

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