President Obama argued Friday that the Group of Eight nations had sent a clear message to Iran: The world will not "wait indefinitely" and allow the country to build nuclear weapons. “The international community has said, ‘Here’s a door you can walk through that allows you to lessen tensions and more fully join the international community,’ ” Obama told reporters at a news conference at the end of the G-8 summit in Italy. “If Iran chooses not to walk through that door, then you have on record the G-8 to begin with, but I think potentially a lot of other countries, that are going to say, ‘We need to take further steps.’ ” Obama met with some fellow leaders to push for a threat of potential new sanctions against Iran, but the G-8 did not issue such a threat.