Obama's secret outreach to Iran not so secret

If negotiations get underway, the biggest worry is that the Iranians will try to use the talks as a way of running out the clock until their nuclear program is more advanced. That’s what frustrated European diplomats believe Tehran did to them over the last five years. So one of the toughest parts of the U.S. strategy will be setting a deadline by which the Iranians must move — and sticking to it.