Smoke & Steel - Secrets of the Modern WorldTV Show

A mill on the outskirts of Manchester was part of a dawning revolution in the way we work - the factory. A bridge in St. Louis, USA pioneered the use of steel - a construction material that would reshape our world. And a vast hangar in Brazil built to house the airships transformed passenger travel in the 20th century, but those giants of the sky owed a debt to an earlier age.