Via azpm.org In the San Carlos Industrial Park in Nogales, Sonora, an American company building parts south of the border affords a view into what ties Arizona to Mexico economically. One doesn’t have to go far to get to the park. Ten minutes south of the border with Arizona, it is home to multiple companies from the U.S., Europe and Asia. Magnetic Metals discovered a healthy work force when it opened in the 1980s. Foreign companies that operate in Mexico face certain hurdles, but so-called “shelter service” help make it more manageable. On Arizona Week we visit the park and those who take part in cross-border manufacturing industry that pulls the neighboring states together, and take a closer look at declining exports from Arizona to Mexico.