A girl plays in a bed of coca leaves on Sept. 25 in the village of Trincavini in Peruís Pichari district. Pichari lies on the banks of the Apurimac river in a valley that the United Nations says yields 56 percent of Peru’s coca leaves, the basis for cocaine. Coca is central to rituals and religion in Andean culture but in recent decades has become more associated with global drug trafficking. (Rodrigo Abd/Associated Press)