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The Federal Protective Service will enhance its presence at some buildings in Washington. Homeland Security said public calls by terrorists to attack the U.S. spurred the new measures.

The area of land no longer suitable for farming because of salt degradation is rising quickly. Scientists argue the private sector should help fund efforts to reverse it since it relies on the crops.

The Department of Homeland Security is beefing up security at federal buildings as a precautionary measure after recent attacks in Canada and ongoing threats from the so-called Islamic State.

Lava has been flowing toward the small town of Pahoa on Hawaii's Big Island since June and is oozing closer to dozens of homes. Renee Montagne speaks to Hawaii Public Radio's Molly Solomon about the eruption and how prepared residents are.

Voters will decide on a penny-per-ounce tax on sugary drinks in Berkeley and a 2-cent-per-ounce tax in San Francisco. But the soda industry's lobbying group has spent millions blasting the measures.

The new protocol announced by Dr. Tom Frieden on Monday stops short of the mandatory 21-day quarantines imposed by some states. Instead, it relies on individual assessment and close monitoring.

The New England Journal of Medicine published an editorial against quarantining people who have worked with Ebola patients in Africa. Renee Montagne speaks with Dr. Lindsey Baden, one of the authors.

Speaking at an assembly of the Pontifical Academy of Sciences, Francis also affirmed that evolution and the Big Bang are consistent with a creator.

Former New York City Mayor Michael Bloomberg will invest $10 million over two years to help top students from poor families into college.

One man's quest for the perfect loaf took him to Paris, Berlin, California and Kansas. What he learned can't easily be captured in words. It's a feeling in your fingers that comes from experience.