PCORI Executive Director Joe Selby says grants to medical societies are needed to get through to busy professionals who "may not answer our phone calls." Stephen Elliot/Courtesy of PCORI hide caption

itoggle caption Stephen Elliot/Courtesy of PCORI

The Willy Brandt Berlin Brandenburg International Airport was supposed to open in 2012, but has been delayed repeatedly and is now set to open in 2017. The cost overruns and delays have made airport the butt of frequent jokes. Sean Gallup/Getty Images hide caption

itoggle caption Sean Gallup/Getty Images

Final inspection of frozen blueberries at the Atlantic Blueberry Company. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

Parents of children who are extremely finicky may find it useful to seek help, psychologists say, because some kids won't outgrow the behavior on their own. But don't make the table a battlefield. Chad Springer/Corbis hide caption

itoggle caption Chad Springer/Corbis

Babajide Bello of the tech company Andela takes a selfie with AOL's Steve Case after the pair played a pickup game of pingpong. Courtesy of Andela hide caption

itoggle caption Courtesy of Andela

Falling oil prices have put downward pressure on gasoline prices, now averaging $2.65 a gallon — about 85 cents cheaper than a year ago. Gene J. Puskar/AP hide caption

itoggle caption Gene J. Puskar/AP

Not only did the family trade their urban life for one in a beautiful valley surrounded by mountains and trees, but they also earn $300,000 a year. Ari Shapiro/NPR hide caption

itoggle caption Ari Shapiro/NPR

Ten years ago, Hurricane Katrina made landfall near Pearlington, Miss., a tiny town on the border with Louisiana. A home currently under construction there adheres to new FEMA standards for elevation. David Schaper/NPR hide caption

itoggle caption David Schaper/NPR

Angelica Rivera, the wife of Mexico's President Enrique Pena Nieto, has been embroiled in controversy over the purchase of a luxury home. Thomas Samson/AP hide caption

itoggle caption Thomas Samson/AP

Billionaire businessman Donald Trump has surged to the top of GOP presidential primary polls despite a slew of controversial comments since he launched his campaign in June. Scott Heppell/AP hide caption

itoggle caption Scott Heppell/AP

Children walk down one of the many empty streets next to the vacant lots where houses once stood. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

Researcher John Clements in the early 1980s, after he figured out that lungs need surfactants to breathe. David Powers/Courtesy of UCSF hide caption

itoggle caption David Powers/Courtesy of UCSF