Chrysler is driving out of Mexico City. The car company said on June 30 that it is closing its 54-year-old small-truck plant in the city. It didn't say where or when it will move. Four months ago, GM announced plans to shut down its Mexico City plant and open a new one in Guanajuato, 150 miles north.

GM says it is moving because of Mexico City's tough new antipollution regulations. For its part, Chrysler says the move will allow it to expand production in Mexico. And in leaving Mexico City, the carmakers also are leaving behind a militant work force.

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