Mexico appears to be a big free trade winner in this year's U.S.-Mexico-Canada Agreement.

Foreign direct investment in North America has increased as international companies seek access to the world's largest market.

But there's trouble on the Mexican rails.

Protesters and members of a militant teachers union have blockaded railroads at seven different locations across the state of Michoacan, in an action that has now lasted more than 50 consecutive days, bringing the state's railway network to a complete standstill.

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