Dayton Duncan

The Dust Bowl

7.9

The National Parks: America's Best Idea

8.2

Country Music

7.8

Mark Twain

6.9

Lewis & Clark - The Journey of the Corps of Discovery

7.5

Horatio's Drive: America's First Road Trip

7.3

The American Buffalo

6.7

Yosemite — A Gathering of Spirit

0.0

Mark Twain

0.0