Embedded Player NPR's Gerry Hadden reports Mexico's President Vicente Fox has proposed an ambitious plan for economic development in the south of Mexico. NAFTA -- the North American Free Trade Agreement -- has so-far only benefited the northern part of the country. In the south, Fox has proposed building a trade corridor to attract factories and investment. But workers in the south are worried about being exploited. And Zapatista Indians say the plan will disrupt their way of life.