Al "Scarface" Capone sparks one of the bloodiest massacres in gangland history, in this clip from Season 1, "St. Valentine's Day Massacre."
On April 3, 1996, a CBS news report announces the arrest of Theodore Kaczynski, the Harvard graduate who was suspected and later proven to be the Unabomber. Kaczynski terrorized the country for nearly two decades with a series of mail bombings that killed three people and wounded 23.