In the French city of Marseille, there's a war on drugs. The police are cracking down on gangs dealing from estates in the city's north. The dealers say it's the only way to survive. We gain rare access to both sides.

From zero tolerance to decriminalisation, Thailand's U-turn this year on cannabis laws is lighting up a billion-dollar industry. Officially it's for medicinal use but the legal grey area means 'ganja' lovers are celebrating.