Farah Pandith, a former senior diplomat responsible for combatting violent extremism in both the George W. Bush and Obama administrations, talks about her new book “How We Win: How Cutting-Edge Entrepreneurs, Political Visionaries, Enlightened Business Leaders, and Social Media Mavens Can Defeat the Extremist Threat,” with host Carol Castiel and Hasib Alikozai, Managing editor for VOA’s Extremist Watch Desk.