Reporting Iran to the UN Security Council for defiantly pressing ahead with its suspect nuclear program is just a matter of time, a senior US State Department official suggested Monday. "Clearly our patience is limited. We're now talking 'when' or 'how' rather than 'whether' we will report them to the Security Council," which has the power to slap Iran with sanctions, said the official, speaking on condition of anonymity because he was not authorized to discuss the issue with journalists. Iran is engaged in "many activities that raise concern," the official said. "This is all about a weapons program, not a civilian program. It's a bright red line" indicating the Tehran regime is seeking nuclear weaponry, he said.