Pinnacle Silver & Gold Corp (TSX-V:PINN, OTCQB:PSGCF) CEO Robert Archer talked with Proactive about the company's first drill program at the El Potrero project in Mexico, a unique initiative starting with underground drilling rather than surface work. Archer explained that the underground access available at El Potrero, due to historic mining that ceased 35 years ago, gives the company immediate access to mineralized zones. However, he pointed out the current workings are limited in extent, and only samplin ...