Twenty miles south of downtown, the Port of Los Angeles spreads over 7,500 acres of San Pedro Bay and its shoreline. It’s the busiest container port in the United States, and when combined with the neighboring Port of Long Beach is the fifth busiest in the world. Each day more than half a billion dollars in goods - primarily furniture, apparel, and auto parts from Asia - are loaded into hundreds of big-rig trucks. Half set out for destinations east of the Rockies.