and it's very localized. >> pelley: john prendergast worked on africa policy in president clinton's whitended something called "the enough project," which works to expose war crimes. >> prendergast: if you do a conflict analysis, you will find that, when there are spikes in violence, it has something to do with contestation over the mineral resources-- gold and the rest of them. >> pelley: one recent spike centered on a village called kanyabayonga. we went there with united nations troops, and found that a rebel militia had raided the village and burned 70 homes. why attack the civilian population? >> prendergast: it's a very effective strategy. it scares the people. it terrorizes them into compliance. >> pelley: it's chaos. >> prendergast: it's chaos that is organized in order to exploit the gold and other minerals for the enrichment of these armed groups. and it just keeps the cycle going and going until we break that cycle and begin to address the root issue here, which is the gold and the other conflict minerals. >> pelley: villagers caught in the combat pour into camps like the one w