the border in afghanistan, he disappeared shortly after 9/11, to know more about osama bin laden, to bring you his whole story, we visited his home, his headquarters, his hideouts. we journeyed in his footsteps, from saudi arabia, to pakistan, to afghanistan. those who have prayed with him, lived with him and fought for him share the story of his gradual but deadly transformation. from a quiet, religious boy, to the angry voice of holy war. ♪