All Things Considered on HD2

Composer Mark Adamo has made beautiful music out of classic books. His Little Women is among the most produced American operas today. He also wrote the words and music for his operatic adaptation of Aristophanes' Greek drama Lysistrata.

His latest work, The Gospel of Mary Magdalene, has proved more controversial. The opera, which premieres June 19 at the San Francisco Opera, tells the story of Mary, Jesus and his disciples.

The Baltic city of Tallinn hardly looks modern with its blend of medieval towers and Soviet-era architecture. Smoke-spewing buses and noisy streetcars look as if they have been plucked from the past.

Even so, the Estonian capital is one of the world's most technologically advanced cities. The birthplace of Skype has repeatedly been cited for its digital accomplishments. Last week, Tallinn once again made the short list of the world's most intelligent cities as selected by the Intelligent Community Forum.

The Bracken Bat Cave, just north of San Antonio, is as rural as it gets. You have to drive down a long, 2-mile rocky road to reach it. There's nothing nearby — no lights, no running water. The only thing you hear are the katydids.

The cave houses a massive bat colony, as it has for an estimated 10,000 years. Bat Conservation International, the group that oversees the Bracken Cave Reserve, wants it to stay secluded, but the area's rural nature could change if a local developer's plan moves forward.

The runways at Fort Huachuca, Ariz., are busy. This is where the Army tests its military drones, where it trains its drone pilots, and where four Customs and Border Protection drones take off and land.

From here, the CBP drones survey the Arizona-Mexico border — mainly looking for immigrants and drug smugglers.

When President Obama first took office in 2009, he had an idea called the Social Innovation Fund.

"We're going to use this fund to find the most promising nonprofits in America," he said when announcing the plan. "We'll examine their data and rigorously evaluate their outcomes. We'll invest in those with the best results that are the most likely to provide a good return on our taxpayer dollars."