Director, producer and writer Alex Gibney joins White House correspondent Paula Reid to discuss his latest HBO documentary - "Agents of Chaos." The two-part doc examines Russia's interference in the 2016 U.S. presidential election. Gibney shares how he gained access into the Russian troll farms and how he got many of the key figures to sit down for an interview. He tells Reid why he believes Russia was looking to sow chaos in the United States and how the country was unprepared for asymmetrical warfare. However at the core, Gibney says Russia did nothing but expose division that already existed and what they did only worked because we are so polarized.