US Secretary of State Condoleezza Rice said Sunday that the international community's credibility is at stake as it confronts Iran over its alleged nuclear weapons ambitions. "I think they're playing games," Rice said of Iran on ABC's This Week news program. "We have a choice," she said. "We can either mean what we say, when we say that Iran must comply, or we can continue to allow Iran to defy." The White House says Iran must give up its nuclear ambitions and the debate must move to the UN Security Council.