FRONTLINE investigates the battle over climate change, what Russia’s president really wants, walls at our borders and more. Here’s a sneak peek at documentaries we’re working on for Season 36. Subscribe on YouTube: http://bit.ly/1BycsJW Facebook: https://www.facebook.com/frontline Twitter: https://twitter.com/frontlinepbs Instagram: https://www.instagram.com/frontlinepbs FRONTLINE is streaming more than 200 documentaries online, for free, here: http://to.pbs.org/hxRvQP FRONTLINE is made possible by PBS and CPB. Major support is provided by The John D. and Catherine T. MacArthur Foundation. Additional support is provided by Ford Foundation, the Park Foundation, the John and Helen Glessner Family Trust, the Wyncote Foundation and Jon and Jo Ann Hagler on behalf of the Jon L. Hagler Foundation.