What are the chances of an Iran nuclear deal now?

Aired: 3/3/2015 | 0:07:19 | Clip
Benjamin Netanyahu, prime minister of Israel, warned Congress of the dangers of making a bad nuclear deal that could pave “Iran's path to the bomb.” What would a good deal achieve? And is Netanyahu right about the threat of Iran? Gwen Ifill gets two views from former National Security Advisor Stephen Hadley and former State Department official Vali Nasr.