The Los Angeles River was tamed years ago. The river, by nature wanting to be violent and random, doses now in a concrete bed through downtown Los Angeles. In the city's core, there are over a dozen bridges that connect Los Angeles across the river--and these bridges are architectural marvels These bridges were built in the first decades of the 1900s, and their history continues. The largest and longest bridge, the Sixth Street Viaduct, is in the...