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David Greene talks with Sylvain Groulx, head of mission for Doctors without Borders in the Central African Republic, about the state of the violence there and the hopes for peace now that French troops have arrived.

In the wake of violent clashes between protesters and police in Ferguson, Mo., President Obama is ordering a review of the federal programs that help local police departments purchase military gear.

Some argue that workers should be able to move more freely in a global economy. But others push back, saying an influx of labor into the richest countries would devalue workers' worth and actually hurt more in the long run. A group of experts debates for Intelligence Squared U.S.

Medical tourism was expected to be huge in 2013, and countries like Colombia, which has seen huge improvements in safety and tourism, decided they wanted in on the action. In recent years they've been building facilities specifically designed for medical tourists. But the numbers have not quite met projections.

The Affordable Care Act's rollout has taken the remarkable Democratic Party unity that existed during the government shutdown and smashed it to smithereens.

Previous estimates of the climate-warming gas were based on the rough number of methane-emitting sources on the ground — such as factories, refineries, stoves, swamps, landfills and cattle herds. But by directly measuring levels of methane in the air instead, a new study puts the total much higher.

Some consider former NSA contractor Edward Snowden a hero for releasing classified material to the media; others argue that he has irreparably harmed national security. Famed whistleblower Daniel Ellsberg and a former CIA director face off in the latest Intelligence Squared debate.

NASCAR executives and drivers hope changes to the playoff system boost flagging TV ratings and attendance. The new rules alter how drivers qualify, and the season has a Super-Bowl-like finish.

Although Latinos are 17 percent of the population, they represent almost a third of frequent moviegoers. People of color overall attend movies at rates higher than their percentage of the population.

In Chile, a fire that started in the hills above Valparaiso continues to burn. The blaze has killed 15 people and destroyed 2,500 homes in the area that surrounds Valparaiso. Reporter Alexandra Hall looks at some of those affected.