Manual eradication and seizures are helping reverse a years-long increase in coca cultivation.
The drug policy expert weighs in on effective solutions to Colombia's resurgent coca problem.
Drug cartels exploit political instability and corruption wherever they take root.

Members of the insurgent group Sendero Luminoso launched an attack on an army post yesterday in the Valley of the Apurimac and Ene rivers (VRAE) region of central Peru that left at least one police officer wounded.

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