Firefighters douse blazes after a freight train loaded with oil derailed in Lac-Mégantic in Canada's Quebec province on July 6, 2013, sparking explosions that engulfed about 30 buildings in fire. AFP/Getty Images hide caption

itoggle caption AFP/Getty Images

A photo released by Tesla shows its new Powerwall lithium-ion battery pack mounted on the wall (left) of a garage behind one of the company's electric cars. Tesla Energy hide caption

itoggle caption Tesla Energy

A view inside the Kern's Kitchen factory in Louisville, Ky. Though lots of people in Kentucky have their own versions of what they call "derby pie," the Kern family trademarked the name "Derby-Pie" decades ago. And the Kerns are quite vigilant about protecting that brand name. Nina Feldman for NPR hide caption

itoggle caption Nina Feldman for NPR

Oakland police officers, wearing body cameras, form a line during demonstrations against recent incidents of alleged police brutality nationwide. Elijah Nouvelage/Getty Images hide caption

itoggle caption Elijah Nouvelage/Getty Images

Aetna announced one of its largest pay hikes recently. CEO Mark Bertolini says he believes it largely could pay for itself by making workers more productive. Courtesy of Aetna hide caption

itoggle caption Courtesy of Aetna

UnitedHealthcare says it will cover doctors' visits by live video on smartphones, tablets and computers. Doctor On Demand hide caption

itoggle caption Doctor On Demand

Tyrone Peake says he's been fired from three jobs because a crime he committed more than 30 years ago is still on his record. Carrie Johnson/NPR hide caption

itoggle caption Carrie Johnson/NPR

Engaging, mentally stimulating work is good for the brain, scientists say, whether you get paid to do it or not. Running a household can be as mentally demanding as running a company. iStockphoto hide caption

itoggle caption iStockphoto

Japan's Prime Minister Shinzo Abe speaks during a joint press conference at the White House with President Obama on Tuesday. Abe is urging U.S. lawmakers to approve a trans-Pacific trade deal. Mandel Ngan/AFP/Getty Images hide caption

itoggle caption Mandel Ngan/AFP/Getty Images

Back in 2012, Silver Diner — a fast-casual restaurant chain in Maryland and Virginia — completely overhauled its children's menu. Those changes helped dramatically improve the healthfulness of kids' meals ordered, a new study finds. Ron Cogswell/Flickr hide caption

itoggle caption Ron Cogswell/Flickr