The man behind LA's skyline

Architect and author David Martin’s thumbprints are quite literally on the skyline of LA. He is best known for designing some of the city's iconic buildings - including the Wilshire Grand Center skyscraper - at 73 stories it is the tallest building west of the Mississippi. David also runs the Martin Architecture and Design Workshop (Madworkshop) which is a non profit foundation that focusses on architectural innovation. David is also the author of a new book - Joy Ride - about his travels in Mexico exploring the country's ancient buildings.