VIENNA, Austria - Iran has expanded its uranium enrichment program instead of complying with a U.N. Security Council ultimatum to freeze it, the U.N. nuclear watchdog agency said Thursday in a finding that clears the way for harsher sanctions against Tehran. "Iran has not suspended its enrichment-related activities," the International Atomic Energy Agency said in a report. Although its information was based on material available to it as of Feb. 17, a senior U.N. official familiar with Iran's nuclear file, speaking on condition of anonymity because he was not authorized to speak on the issue, suggested the IAEA's conclusion remained...