Named after the 40th governor of Louisiana, the Huey P. Long Bridge, just outside of New Orleans in Jefferson Parish, is the longest railroad bridge in the United States. For 15 years after it opened in 1935, it was the longest railroad bridge in the world. Initially conceived in 1892, the "Huey P." was the first bridge to span the deep-draft navigation channel of the lower Mississippi River, opening the path for a southern transcontinental railroad...