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Rick Scott, Florida's GOP governor, has come under criticism for his record on the environment. Now, he's rolling out his own proposals for safeguarding the state's water and wildlife preserves.

Lithuania has called an emergency meeting of the UN Security Council to discuss Russia's new incursions into Ukraine. The issue's also likely to dominate an upcoming NATO summit. Since sanctions seem to have failed to change Russia's calculations, the U.S. and its European partners are still trying to find a way to effectively protect Ukraine's sovereignty.

Many Star Trek gadgets have made the journey from science fiction to real life. Arun Rath talks to Grant Campany about the X Prize Foundation's competition to bring the medical tricorder to life.

Summer is high season for "frogging." The North American Amphibian Monitoring Project has hundreds of volunteers crisscrossing the country to get a better handle on the fate of the nation's frogs.

The murder trial of Olympian Oscar Pistorius is nearing its conclusion in South Africa. To hear more about the closing arguments, Audie Cornish speaks with BBC correspondent Milton Ngozi, who has been covering the trial in Pretoria.

Dr. Kent Brantly and missionary Nancy Writebol have gone through "a rigorous course of treatment and thorough testing," Emory University Hospital's Dr. Bruce Ribner says.

The death of Brazil's Socialist Party presidential candidate created an opportunity for his running mate, Marina Silva. Her entry into the race has upended the situation. Whereas the man she replaced was running a distant third in polls, support for Silva has surged.

Fighting has intensified near two major cities held by pro-Russian separatists in eastern Ukraine. In Berlin, a meeting on a cease-fire ended without any breakthrough.

The long-serving mayor of Rhode Island's capital city spent more than four years in prison on felony corruption charges and was forced to resign — twice. And now he's running again for mayor.

The Sentencing Commission meets Friday to vote on a plan that could send home tens of thousands of federal inmates convicted of drug trafficking.