Wealthy Mexican nationals make their home in Sonterrey

Propelled north by cartel violence, wealthy Mexican immigrants have regrouped in gated developments in several Texas cities, where their growing influence has been compared to the impact of well-heeled Cuban refugees arriving in Miami decades ago. Nowhere is the evidence more striking than in San Antonio, Texas' second-largest city and a short private jet hop from Monterrey, where many of the new immigrants built their wealth.