Children walking home from school in Bacolod City, the Philippines

Children walking home from school in Bacolod City, the Philippines (Source: Brian Evans/Flickr)

A close-up of an opium poppy in Afghanistan

A close-up of an opium poppy in Afghanistan. (Source: UN Photo/UNODC/Zalmai)

Drug-testing tent in Colombia (Source: ATS/Julian Quintero)

Drug-checking tent in Colombia (Source: ATS/Julian Quintero)

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