Alec Ross, former senior adviser on innovation in Hillary Clinton’s State Department, talks with Anne-Marie Slaughter about the great contemporary arms race to see which nation can dominate cyber warfare—as well as the possibilities of digital diplomacy. They’re joined by New America Foundation National Security Studies Senior Fellow Afshin Molavi and New America Foundation Editorial Director Andrés Martinez to talk about the meaning and impact of President Barack Obama’s conversation with Iran’s President Hassan Rouhani.