FILE PHOTO: Police burn mattresses during an operation to destroy illegal gold mining camps in a zone known as Mega 14, at the southern Amazon region of Madre de Dios, July 13, 2015. Peruvian police razed dozens of illegal gold mining camps at the edge of an Amazonian nature reserve this week, part of a renewed bid to halt the spread of wildcatting in a remote rainforest region. REUTERS/Janine Costa/File Photo