Fmr. Energy Secretary: ‘Of course we knew’ Iran had a weapons program, ‘we said so publicly, the IAEA said so publicly’

Israel’s Prime Minister Benjamin Netanyahu put on a theatrical display in his campaign against the Iran nuclear deal - claiming the country remains a nuclear threat and doing it in English for an audience of one, President Trump, who could tear up the nuclear deal as soon as next week. Ernest Moniz, former Energy Secretary under President Obama, joins Andrea Mitchell to discuss.