This episode continues our look at the fissures opened in American society over US involvement in the Vietnam War and the treatment of African-Americans. On January 31, 1968, South Vietnamese commandos allied with the communist north enter the grounds of the US embassy in Saigon. Images of the fighting are relayed via satellite to American living rooms for the first time in history. On February 3, an insurgent commander is hauled before the national police chief. Footage of his roadside execution shocks the world. On April 3, Reverend Martin Luther King, Jr. gives his last speech.