Barak: Iran deal is bad, but Trump withdrawal not ‘optimal’

Ehud Barak, former prime minister of Israel, says the fact that the U.S. pulled out doesn’t cancel the Iran nuclear deal, and that it would have been better for President Trump to work with allies to pressure Iran on various issues. Barak joins William Brangham to discuss Israel’s security, his career in government and new memoir, "My Country, My Life: Fighting for Israel, Searching for Peace."