Investigative journalist Sy Hersh reveals that the Obama administration knew that the sarin used in the 2013 Ghouta attack did not match the characteristics of the one that the Syrian military had at the time. The administration also knew that Saudi Arabia and Turkey were providing chemicals to Al Nusra in Syria that, when mixed together, make a nerve agent referred to as 'kitchen sarin'. Hersh also discusses the anti-Syrian gov. propaganda organization, the White Helmets, and the poisoning of Sergei Skripal and his daughter in Salisbury, UK.