tantalum, tungsten, tin, and gold have all been linked to violence in eastern congo by rebel groups and the congolese army. >> millions of people have been killed in the congo over the past decade. i want to see peace in the congo. >> the same minerals are used to make common electronics,that are sold all over the world. but in 2010, after months of lobbying by advocacy groups an obscure resolution called section 1502, was dropped into the dodd-frank wall street reform act. it means publicly traded companies are now required to track whether their products contain conflict minerals from congo. some of the top tech brands are taking credit for reducing violence here -- with the world's largest chip-maker intel even claiming that some of their products are now "100% conflict free". >> "we're proud to say the world's first commercially available conflict free microprocessors do just that". >> but how sure can they be? fault lines travels to eastern congo to investigate. john kanyoni is the owner of a leading trading house in goma. he makes his living selling tin and tantalum to internation

tantalum, tungsten, tin, and gold have all been linked to violence in eastern congo by rebel groups and congolese army. >> millions of people have been ki

tantalum, tungsten, tin, and gold have all been linked to violence in eastern congo by rebel groups and congolese army. >> millions of people haee

tantalum, tungsten, tin, and gold have all been linked to violence in eastern congo by rebel groups and the congolese army. >> millions of people have been killed in the congo over the past decade.

tantalum, tungsten, tin, and gold have all been linked to violence in eastern congo by rebel groups andthe congolese army. >> millions of people have been killed in the congo over the past decade.

tungsten. hikers -- funston. hikers and dogs should not get any deeper than 2 feet from the edge. on 280 the drains were having trouble staying ahead of the downpours. >> these barriers put in place near one of the most flood prone areas of the city, 17th and folsom. >>> a hand full of sonoma county schools will be closed tomorrow, harmony elementary and sand creek charter school in occidental with guerneville school. >>> let's take a live look outside in san jose now. if you live here, you're wondering what are you talking about all this rain? it's been pretty dry all day, but you will get some rain tomorrow. >>> an update on a story we've followed for months, a plan to ship potentially toxic coal through oakland. tonight it is a step closer to reality. the plan, build a coal export terminal on city land. the state of utah wants to ship tons of coal through here. today the utah state legislature passed a bill to invest 53 million taxpayer dollars in the terminal in oakland. their governor is expected to sign it. however, oakland city council could still block that coal deal. >>>