The video above is being shown onstage now at TEDWomen and livestreamed around the world to TEDx events. TEDWomen cohost Pat Mitchell, the President of the Paley Center for Media, sits down for an intimate Q&A with Ellen Johnson Sirleaf, president of Liberia. In this 3-minute video, Sirleaf talks about some of the leadership challenges a woman faces — and talks about her unofficial sobriquet: Liberia’s “Iron Lady” …