the world, was an improvisation. >> so fascinating and such a wide range of voices that contributed to this. i'm not sure how you went about choosing. you have jackie robinson's wife and marco rubio and malala. >> we wanted to do everything we possibly could do to get perspective on that march and speech and so we talked to a lot of people that were there. one of the nice things is that it was 50 years ago and it was a very different country, of course. the position of blacks in america at that time. when you think back to the fact that there was still segregation on buses, people trying to get to washington and they can't travel freely across america. we wanted those perspectives from that day and we're lucky that a lot of the people involved in that movement were very young. john lewis was 23 years old. >> amazing. >> amazing. >> lincoln memorial. those people happily are still with us. on the other hand, we wanted to also hear from contemporary