Firefighters douse blazes after a freight train loaded with oil derailed in Lac-Mégantic in Canada's Quebec province on July 6, 2013, sparking explosions that engulfed about 30 buildings in fire. AFP/Getty Images hide caption

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Charlotte Mayor Anthony Foxx addresses the Democratic National Convention in Charlotte, N.C., on Sept. 4. President Obama on Monday will nominate Foxx as his new transportation secretary. J. Scott Applewhite/AP hide caption

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