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Cement plants, like Ash Grove in Chanute, Kan., burn hazardous waste for fuel, causing anxiety for nearby residents despite assurances of regulators.

Cement plants, like Ash Grove in Chanute, Kan., burn hazardous waste for fuel, causing anxiety for nearby residents despite assurances of regulators.

Revenge attacks are alarming those hoping for a swift transition to peace in Libya. Some villages where loyalists to overthrown dictator Moammar Gadhafi used to live are now abandoned, and locals hope they stay away. As well, militias still have their weapons, and regional rivalries are at play.

Revenge attacks are alarming those hoping for a swift transition to peace in Libya. Some villages where loyalists to overthrown dictator Moammar Gadhafi used to live are now abandoned, and locals hope they stay away. As well, militias still have their weapons, and regional rivalries are at play.

While the controversy surrounding Republican Herman Cain has dominated the news, the presidential candidates continue to attack one another in videos and paid TV ads. Democrats and Texas Gov. Rick Perry have both targeted the former Massachusetts governor.

Proposals to increase Medicare's eligibility age to 67 from 65 have been gaining traction in Congress, and there's little doubt that the shift in health insurance coverage would reduce federal spending. But some experts say the costs could shift to employers and state governments, and actually cause an increase in overall health spending.

Imagine the U.S. government saying to the people living around Yellowstone, "You know what? All those wild animals in the park — the grizzlies, the bison, the wolves — they belong to you." This is exactly what the government of Namibia has done in a radical experiment to save wildlife — and the people who share their land.

Imagine the U.S. government saying to the people living around Yellowstone, "You know what? All those wild animals in the park — the grizzlies, the bison, the wolves — they belong to you." This is exactly what the government of Namibia has done in a radical experiment to save wildlife — and the people who share their land.

Drug shortages may be the new normal in U.S. medical care, experts say. Most drug shortages occur because something goes wrong in the manufacturing process that halts production.