Iran has inaugurated two key nuclear-related projects just days after another round of talks with world powers seeking to limit its atomic program ended in another stalemate. Operations are now under way at Iran's biggest uranium mine and a uranium ore concentrate production plant, according to state media. Neither site represents breakout technology for Iran, which already has smaller uranium mines and processing facilities. But it gives Iran greater self-sufficiency in making the raw materials for enrichment to nuclear fuel and, potentially, for warhead-grade material. The country is aiming to dramatically expand its enrichment program amid UN sanctions that prevent it from buying nuclear materials.