Senior U.S. official : Strategy is to build a coalition with Iran and China . Iran admits to existence of second uranium enrichment plant , U.N. agency says . Officials : President Hu Jintao recently shared sensitive intelligence with Russia , U.S. . Administration 's goal is to impose new sanctions on Russia , officials say .
Senior U.S. official : Strategy is to build a coalition with Russia and China . Iran admits to existence of second uranium enrichment plant , U.N. agency says . Officials : President Obama recently shared sensitive intelligence with Russia , China . Administration 's goal is to impose new sanctions on Iran , officials say .