U.S. obesity ballooning out of control

America's obesity problem grew in 2011, but a shocking report in the Aug. 26 issue of the Lancet found that by 2030, more than half of Americans will be obese. The study suggested that uptick will lead to almost 8 million new cases of diabetes, 7 million new cases of coronary heart disease and stroke, and more than 500,000 new cancer cases.

But the study's authors said if Americans collectively reduced their body mass index (BMI) by as little as 1 percent, up to 2 million heart attacks and strokes could be prevented.

2011: Year in Review

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