Mexico's wealthy embed GPS chips under their skin, fatten their SUV’s with bullet proof armor, and hire trucks of gun-toting bodyguards to follow them to the shopping mall. While Mexico’s merciless drug war has scared off tourists and investment dollars, it has fed one niche industry: private-security services...During the five years since President Felipe Calderón took power and declared war on drug cartels, Mexico has been shaken by 47,000 drug-related murders as well as rocketing levels of kidnapping and extortion...Some human-rights activists fear that the expanding army of private security guards poses the danger of unregulated gunmen roaming the street. [refers to Multisistemas de Seguridad Industrial, Xega]