The Mexican government estimates that 6.6 million of its citizens live in the U.S. It's now recruiting those people to sign up for low-cost health insuranceIn an effort to achieve universal health insurance coverage. The coverage only pays for care in Mexico. Some Mexicans living in Denver say that means they'll probably never use the coverage. Others welcome it. How many choose to sign up will determine whether the Mexican government's efforts will cut health care costs for immigrants that are currently shouldered by U.S. taxpayers.