The beginning of the end for Steve Bannon came when he stepped into the limelight at the annual Conservative Political Action Conference, observers tell FRONTLINE. Subscribe on YouTube: bit.ly/1BycsJW With Bannon now leaving his post as chief strategist, here’s the moment when some say his days in the Trump administration became numbered. Watch the full documentary, "Bannon's War," online: to.pbs.org/2p1w7EW Twitter: twitter.com/frontlinepbs Facebook: www.facebook.com/frontline Google+: plus.google.com/+frontline/posts FRONTLINE is streaming more than 200 documentaries online, for free, here: 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.