tell me about martha johnson. >> i think that was the real force that shaped my life and the life of my siblings, our mother was one who taught us the basic things about endurance and commitment and honesty and hard work. she demonstrated her courage, when our father, her husband, had a strong, very early and she had to make ends meet, to give us an education, she was a pastor, so she was deeply rooted in faith and so, we grew up in a family whom, based on prayers and faith and hard work, and i think everything that represents the character in me, really had come from her and the up bringing that she did in our family. [applause]. >> you also go through, i know you make a great point in the beginning of the book as will, to really discuss your roots, and to sit the record straight about your roots. why was that so important to you? sn>> you know, the book is not only about my life story, but i hope in certain small ways identify captured our nation in its history, its beginnings. its triumphs and its tragedy. and for me in the family, our roots were, like i say, we perhaps bridged tw