Midnight Sun Mining Corp (TSX-V:MMA, OTCQB:MDNGF) Vice President of Business Development and Communications Adrian O’Brien spoke with Proactive about the company’s latest drilling results at the Dumbwa target in Zambia.  O’Brien explained that Dumbwa has been the company’s flagship target for more than 12 years, describing it as a 20-kilometer-long soil anomaly that represents the largest and highest-grade recorded in Zambia.  He noted that copper grades in soil samples reached up to 0.73%, higher than the ...