Chevrolet Sonic tells story of Detroit comeback

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In this April 25 2012 phoChevrolet Sonics move down line General Motors OriAssembly plant OriTownship Mich. Nearly four years after

In this April 25, 2012 photo, Chevrolet Sonics move down the line at the General Motors Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptcy protection, the automaker is building the Sonic, the best-selling subcompact car in the nation. It's a vehicle no one thought could be made profitably in the U.S., by a company that few people thought would last. (AP Photo/Duane Burleson)

In this April 25 2012 phoBuick Verano moves along line OriAssembly plant OriTownship Mich. Nearly four years after GM filed

In this April 25, 2012 photo, a Buick Verano moves along the line at Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptcy protection, the automaker is building the Verano and the Sonic, the best-selling subcompact car in the nation. It's a vehicle no one thought could be made profitably in the U.S., by a company that few people thought would last. (AP Photo/Duane Burleson)

In this April 25 2012 phoTammy Ballard works Chevrolet Sonic General Motors OriAssembly plant OriTownship Mich. Nearly four years after

In this April 25, 2012 photo, Tammy Ballard works on a Chevrolet Sonic at the General Motors Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptcy protection, the automaker is building the Sonic, the best-selling subcompact car in the nation. It's a vehicle no one thought could be made profitably in the U.S., by a company that few people thought would last. (AP Photo/Duane Burleson)

DETROIT — When the word reached the Orion Assembly Plant, it spread along the serpentine assembly line like news of a death or natural disaster: General Motors, the biggest automaker in the world, had filed for bankruptcy protection. On that grim day in 2009, Chevrolet …