A woman walks with children at an orphanage in Addis Ababa, Ethiopia. Policymakers have long called for orphans to be taken out of institutions and placed with foster families, but one study from Duke University is challenging that notion. Sean Gallup/Getty Images hide caption

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Chase Iron Eyes, an attorney with the Lakota People's Law Project, is calling for a turnaround of child welfare and foster care systems. Kevin Cederstrom/AP hide caption

itoggle caption Kevin Cederstrom/AP

Peter Piot was one of the co-discoverers of the Ebola virus in 1976. "I never thought we would see such a devastating and vast epidemic," he says. Leon Neal/AFP/Getty Images hide caption

itoggle caption Leon Neal/AFP/Getty Images

This image, posted on a militant website, shows an Islamic State fighter waving a flag from a captured government fighter jet in Raqqa, Syria. The group is well-funded and has gained territory over the past few months; that's raised some concerns in America, although experts say the organization is largely focused on regional goals. AP hide caption

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A pro-Russian rebel walks in a passage at a local market damaged by shelling in Petrovskiy district in the eastern Ukrainian town of Donetsk. Mstislav Chernov/AP hide caption

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The Rev. Willis Johnson (left), pastor of Wellspring Church in Ferguson, speaks to the Rev. Michele Shumake-Keller after the panel discussion in Ferguson, Mo., on Thursday. Johnson said he hoped the event would be a step to healing a "community in trauma." Whitney Curtis for NPR hide caption

itoggle caption Whitney Curtis for NPR

An Israeli soldier launches a drone that's attached to a military vehicle in southern Israel, not far from the border with the Gaza Strip, on July 29. Israel was a pioneer with drones and has developed a number of military technologies that it later sells abroad. Jim Hollander/EPA/Landov hide caption

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A Malaysia Airlines crew member inspects an airplane at Kuala Lumpur International Airport on Thursday. The carrier announced it was laying off a third of its workforce amid steep financial losses. Azhar Rahim/EPA/Landov hide caption

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California state Sen. Kevin de Leon (D-Los Angeles) urges lawmakers to approve his measure aimed at curbing sexual assault on campuses on Thursday in Sacramento. Rich Pedroncelli/AP hide caption

itoggle caption Rich Pedroncelli/AP

The orchids that produce vanilla beans have no natural pollinators in Madagascar; the plant must be pollinated by hand — a labor-intensive process with little margin for error. Courtesy of Madécasse hide caption

itoggle caption Courtesy of Madécasse

Britain's Prime Minister David Cameron speaks at a news conference in London on Friday after the U.K. raised its terror alert level. Paul Hackett/PA Photos/Landov hide caption

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New Yorkers can take city-run classes to learn how to make their homes and businesses less attractive to these guys. Ludovic Bertron/Flickr hide caption

itoggle caption Ludovic Bertron/Flickr

A team of body collectors carry the corpse of a woman suspected of dying of Ebola in Monrovia, Liberia's capital. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

President Obama said at a White House news conference Thursday that Russia is to blame for the violence in eastern Ukraine. Larry Downing /Reuters /Landov hide caption

itoggle caption Larry Downing /Reuters /Landov

NFL Commissioner Roger Goodell, shown here in January, has sent an open letter to NFL team owners explaining the league's new policies for preventing and punishing domestic violence and sexual assault. Andrew Burton/Getty Images hide caption

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