Documenting the lives of three of the most pivotal voices of the 20th century - Muhammad Ali, Jim Henson, and Queen Elizabeth II.Documenting the lives of three of the most pivotal voices of the 20th century - Muhammad Ali, Jim Henson, and Queen Elizabeth II.Documenting the lives of three of the most pivotal voices of the 20th century - Muhammad Ali, Jim Henson, and Queen Elizabeth II.