Biography.com - Alan Greenspan Playlist

Watch videos about mathematician, codebreaker, and computer pioneer, Alan Turing.

Naomi Ekperigin talks about Alan Turing's accomplishments in computing during World War II, his conviction for "gross indecency," and his suicide at the age of 41.

Actor Alan Tudyk reflects on the sometimes subtle brilliance of comedy legend Gene Wilder.

Watch videos about the life and tragic death of rap icon Tupac Shakur.