PBS America

The Gallic wars were coming to an end beneath the fortifications of Alesia. After six years of fighting, almost 200 000 warriors came together on the plain. (Part 4 of 4) (S).

1918. As the Armistice bells ring out across the world to celebrate the end of the Great War, a silent killer makes its way home with the soldiers.

In 1943, smog descended over Los Angeles, sickening residents. Clearing the Air: The War on Smog reveals the struggle for clean air, involving years of scientific study and civic pressure.

Joe Valachi was a 'Hitman for the Mob', the first insider to break the Mafia's code of silence. He blew the lid on a secret empire worth $40 billion a year. (Part 10 of 13) (S).

In the northernmost spur of Skye - the Trotternish Peninsula - he visits the Old Man of Storr. (Part 4 of 6) (S).

The Gallic wars were coming to an end beneath the fortifications of Alesia. After six years of fighting, almost 200 000 warriors came together on the plain. (Part 4 of 4) (S).

1918. As the Armistice bells ring out across the world to celebrate the end of the Great War, a silent killer makes its way home with the soldiers.

In 1943, smog descended over Los Angeles, sickening residents. Clearing the Air: The War on Smog reveals the struggle for clean air, involving years of scientific study and civic pressure.

Joe Valachi was a 'Hitman for the Mob', the first insider to break the Mafia's code of silence. He blew the lid on a secret empire worth $40 billion a year. (Part 10 of 13) (S).

The Gallic wars were coming to an end beneath the fortifications of Alesia. After six years of fighting, almost 200 000 warriors came together on the plain. (Part 4 of 4) (S).

1918. As the Armistice bells ring out across the world to celebrate the end of the Great War, a silent killer makes its way home with the soldiers.

In 1943, smog descended over Los Angeles, sickening residents. Clearing the Air: The War on Smog reveals the struggle for clean air, involving years of scientific study and civic pressure.

Joe Valachi was a 'Hitman for the Mob', the first insider to break the Mafia's code of silence. He blew the lid on a secret empire worth $40 billion a year. (Part 10 of 13) (S).

The Gallic wars were coming to an end beneath the fortifications of Alesia. After six years of fighting, almost 200 000 warriors came together on the plain. (Part 4 of 4) (S).