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Perdue Farms, one of the largest poultry companies in the country, says it will change its slaughter methods and also some of its poultry houses. Animal welfare groups are cheering.

Mary Louise Kelly talks to former Sen. Paul Kirk, a supporter of Sen. Bernie Sanders, about Sanders' options now that it appears Hillary Clinton will be the one to face off against Donald Trump.

Ebola put the country's immunization program on pause. Now officials are launching a nationwide vaccination campaign to stop the largest measles outbreak the country has seen in years.

The international pressure on Iran's nuclear program was one of the rare examples of global cooperation in the past year. On most issues, like the war in Syria, the global community came up short.

An analysis of mortality records uncovered the most distinctive cause of death in each state. In Texas, it's tuberculosis. In Maine, the flu. And in Nevada, it's "legal intervention."

Biomass was rising a decade ago as a carbon-neutral energy. But the industry is sputtering as oil and natural gas booms, and some scientists are questioning if it's actually good for the environment.

El Nino ruined this spring's harvest. Can food aid — and maize seeds — be delivered in time?

Hillary Clinton has tapped Virginia SenatorTim Kaine to be her running mate, completing the democratic presidential ticket.

Ailes, the CEO and chairman of Fox News, has been sued by a former anchor, and other accusers have stepped forward. Fox News sources now say the Murdoch family is moving to push Ailes out.

For example, June's average was up 1.62 F. A couple of degrees may not sound like much, but it's persistent warming over decades that alters the atmosphere, the oceans, and most everything else.