This June 11, 2013 photo shows an aerial view of the recently completed cable-stayed bridge called the Baluarte in the western Sierra Madre near Concordia, Mexico. The Durango-Mazatlan Highway vies to be one of Mexico's greatest engineering feats, designed to bring people, cargo and legitimate commerce safely through a mountain range known until now for marijuana, opium poppies and an accident-prone road called the Devil's Backbone.
