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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Chicago Mayor Rahm Emanuel shakes hands at a campaign office Tuesday, as voters gave him a second term. He won a runoff election against Cook County Commissioner Jesus "Chuy" Garcia. M. Spencer Green/AP hide caption

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Chicago Mayor Rahm Emanuel failed to capture a majority of the vote last month, forcing him into a runoff. It's highlighting a divide among Democrats playing out nationally. Charles Rex Arbogast/AP hide caption

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Lincoln, Neb., is home to several startups, which use the city's low cost of living and high quality of life to attract workers. Nicolas Henderson/Flickr hide caption

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Amtrak conductor Michael Laubauskas talks on a radio Feb. 19 as his train departs Trenton, N.J., for Washington, D.C. The U.S. House passed an Amtrak funding bill Wednesday that splits Amtrak's high-ridership Northeast Corridor line that runs from Boston to Washington from the less profitable part of the system. Mel Evans/AP hide caption

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Lincoln has invested hundreds of millions of dollars in revitalizing its downtown, a historic area called Haymarket, to create a more culturally vibrant urban center that is helping the city keep and attract young adults. David Schaper/NPR hide caption

itoggle caption David Schaper/NPR