An expert team of engineers use hi-tech explosions and state-of-the-art drilling rigs to tear through solid granite and build an 11-mile underground tunnel, one of the longest in the world.
 

An expert team of engineers uses the latest advances in construction and design to battle deadly earthquakes, intense heat, and punishing deadlines and build Los Angeles' new Sixth Street Bridge, a 3,500-long bridge that's tough enough to brave the world's worst disasters. The design is known as "The Ribbon of Light."