The two countries have agreed to a deal to jointly invest in Ukraine's mineral, raw materials and natural resource wealth in exchange for future U.S. aid.
Rwandan-backed M23 rebels say they are now in control of the key eastern Congolese city of Goma. Their fighters continue to claim more territory in one of the world's most mineral-rich territories.
Rwandan backed rebels have entered the city of Goma, a key city in neighboring Democratic Republic of Congo. Could the mineral rich region be in danger of tipping into all out regional conflict?
When scientists got their hands on a collection of the world's biggest gem diamonds, they found something surprising inside — clues about what sits hundreds of miles beneath our feet.