By Lydia DePillis
The Washington Post
The city of Saginaw, Mich., has an arson problem.
The former manufacturing hub is filled with vacant properties, the result of losing 48 percent of its residents over a 50-year period, as jobs melted away and more homes went into foreclosure. So people burn down those abandoned buildings, keeping the 50-person local fire department busier than it ought to be for a town of 50,000 people.