They're back: Cheaper mail-order medications from Canada and other foreign lands. iStockphoto.com hide caption

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In San Jose, Calif., on June 6, President Obama encouraged people to sign up for insurance in the nation's largest health insurance market. Stephen Lam/Getty Images hide caption

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President Obama encourages people to sign up for health insurance exchanges in San Jose, Calif., on June 6. Stephen Lam/Getty Images hide caption

itoggle caption Stephen Lam/Getty Images

Big Data may not be much to look at, but it can be powerful stuff. For instance, this is what the new National Security Agency (NSA) data center in Bluffdale, Utah, looks like. George Frey/Getty Images hide caption

itoggle caption George Frey/Getty Images

Expensive prescriptions drugs can stretch people's finances, even if they have insurance. iStockphoto.com hide caption

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Mike Jackson has diabetes and high blood pressure. His eye was damaged after he cut back on insulin because he couldn't afford it. Bryan Terry for NPR hide caption

itoggle caption Bryan Terry for NPR

Evidence is growing that bariatic surgery reduces health risks of obesity. Life in View/Science Source hide caption

itoggle caption Life in View/Science Source

Peter Lee, executive director of Covered California, unveiled the plans and prices that will be offered by private insurers at a media briefing in Sacramento on Thursday. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP