The U.S. is “not setting deadlines” for Iran and still considers negotiations as “by far the best approach” to prevent the Islamic Republic from developing nuclear weapons, Secretary of State Hillary Clinton said.
U.S. ‘Not Setting Deadlines’ for Iran, Clinton Says, Business Week, September 10, 2012
When it comes drawing red lines for Iran, the Obama administration appears to be rather squeamish -- to the extent that at this late date Hillary still insists that negotiations are "by far the best approach".
In contrast, Iran does not suffer from such illusions.
In fact, Iran has decided to draw some red lines of its own.