Custom brokers like Polkinhorn on the US side of the border are excited about NAFTA, but one only has to wander a few blocks to the Mexican border to see how poverty still separates these two countries. In Calexico and Mexicali, the different standards of living still cause disputes over immigration and border pollution. [Background--natural sounds--harmonica] Yards away from US. Customs checkpoints, one man panhandles with his harmonica on a Mexicali street. Boys and Girls Hawk, chicklets and newspapers, thousands come to this city searching for a better life and delivering jobs, housing, schools and health clinics are problems that'll take more than a paper treaty like NAFTA to solve. For Latino USA, I'm Ancel Martinez in Mexicali, Mexico.