The deadly train wreck in southern Spain has cast a pall over one of the nation’s symbols of success. Spain leads Europe and is only second to China in the entire world in mileage of high-speed rail lines. The country's investment to link its distant cities across the Iberian Peninsula with fast trains boosted its economy and became a source of pride. Officials don't know the cause of the wreck between the trains that collided Sunday. And the first deadly crash on a high-speed stretch of track has put a blight on one of the crown jewels of contemporary Spain.
