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Officials said most of the oil was drifting into the Gulf Of Mexico, perhaps limiting the impact to sensitive bird habitats.

Air pollution causes 1 in 8 deaths worldwide, with half of the deaths caused by fumes from home stoves. Fixing the problem isn't as simple as providing more efficient stoves. Habits must change, too.

President Obama is holding a series of bilateral meetings with world leaders in The Hague. Although the event is focused on nuclear disarmament, international attention is dominated by events in Ukraine.

Health workers in the West African nation of Guinea are working to control an outbreak of the Ebola virus. The disease has sickened 86 people and killed 59, according to the World Health Organization.

After a vast oil spill in the waters off Houston, authorities are reopening the shipping channel, hoping to ease the wait on those using it. Dave Fehling of Houston Public Media explains the cleanup.

A House committee and the White House are proposing to move the NSA's phone records program to the hands of phone companies. Privacy advocates and phone companies both support these proposals.

PBS's Frontline travels to the epicenter of a rising epidemic: drug-resistant tuberculosis that's costly and tough to treat. Join us for a live Twitter chat tonight during the film's premiere.

Following the news of an Ebola outbreak in Guinea, Robert Siegel speaks with Pierre Rollin of the Centers for Disease Control and Prevention about the virus' symptoms, transmission and containment.

The contentious Democratic primary for the seat once held by the late longtime Sen. Daniel Inouye has placed age, gender and ethnicity at center stage.

The Kentucky Republican's stance against NSA data-gathering has made him a champion for those worried about federal government surveillance — among them, young voters.