奥巴马：希望怎么了 Obama: What Happened to Hope

Andrew Marr looks back at Barack Obama's first term in office. 　　When Obama stood before a crowd of nearly two million people, preparing to take the oath of office, it was a moment that many never believed they would see: the inauguration of a black American president. Now, through informal and candid interviews with some of Obama's own White House staff and those who have worked...