In this March 13, 2015 photo, coca farmer Alfredo Mosco, 44, right, instructs his young employee Donato Mosco, during the weeding of a coca field, in La Mar, province of Ayacucho, Peru. Hauling cocaine out of the remote valley is about the only way to earn decent cash in this economically depressed region where a farmhand earns less than $10 a day. (AP Photo/Rodrigo Abd)
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