Iran's foreign minister has threatened to restart Tehran's uranium enrichment program if Friday's talks with European nations fail. Kamal Kharrazi says if the two sides cannot resolve the impasse, then Iran "will have no choice" but to restart its enrichment program. The U.S. State Department offered no reaction to Mr. Kharrazi's statement, but said it continues to support the talks. Britain, France and Germany, backed by the United States, want Iran to permanently abandon uranium enrichment, which can be used to fuel nuclear weapons. Tehran has so far refused. Russia has agreed to reprocess all of Tehran's spent nuclear fuel to ensure it is not used in Iranian weapons. But Russian President Vladimir Putin, visiting Israel on Thursday, said the fuel deal alone was not sufficient to prove Tehran's atomic program is peaceful and Iran should agree to nuclear inspections.