USA: The Pursuit of Happiness - Part 1

On the 250th anniversary of the Declaration of Independence, Dwayne Fields travels across the USA, exploring how the document's famous promise - the pursuit of happiness - is being lived today.

In part one of two, Dwayne finds out how the Great Migration has impacted Chicago, tries America's highest zip line in Colorado before saddling up to see how tourism has transformed the lives of Utah's iconic cowboys.