Lydia Polgreen's story on a Congolese mine is a fantastic piece of reporting that deserves to be read in its entirety.

Towards the end she raises an interesting question: U.S. politicians have suggested certifying the source of minerals from Congo, in an effort to avoid funding conflicts. I'm not totally sold on such labeling programs -- diamond-certifying schemes have been another popular one. Money being money, won't military groups cut off from one resource just move on to another? Are there strong examples of commodity certification schemes that have actually stopped a conflict? If so I'd love to hear about it.

Great clip. Thanks very much. I have the same questions as you regarding commodity certification, but no answers. Something to look into a bit more I guess.