The eastern Democratic Republic of the Congo's (DRC's) mining industry involves a web of business, military, and industrial interests, and the average consumer.  One of the country's most valuable cassiterite (tin ore) mines is in Bisie‑tin that allows for more eco-friendly cell phones and other hand-held technology.  Mining Processing Congo (MPC), located near Christian Peacemaker Teams (CPT) in Goma, has a significant interest in mining Bisie.