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Not only are Brazilian artists now getting big play in major museums around the world, but something new is happening inside Brazil: There's a burgeoning appetite for art.

Urban farmers are eyeing rooftops that are already green as potential sites to grow food. But there are big obstacles to rooftop farming — from permitting to transporting water and soil to the top of a building.

Tlacoyos are a doughy corn tortilla of sorts that's cooked on a grill. Whether enjoyed on a plastic plate as street food or fine china in a high-end restaurant, it's been a favorite snack for centuries.

The revelations about U.S. intercepts of terrorist communications might have been intended to reassure the public about the government's vigilance. But they also might have been about providing political cover.

David Greene speaks with NPR's Don Gonyea, Scott Horsley and Brian Naylor about The Des Moines Register's Great Bicycle Ride Across Iowa. The three reporters are riding in the event, also known as RAGBRAI, to explore the Iowa they didn't see on the presidential campaign trail.

Disgusted by reports that members of the Australian Army emailed videos and pictures that degrade women, the service's leader says its time to change. "If you're not up to it, find something else to do with your life," Lt. Gen. David Morrison says.

Television networks are up in arms. The new company Aereo is charging a monthly fee to provide a high-definition feed of the basic over-the-air channels, and the stations aren't seeing a penny of it. But CEO Chet Kanojia thinks he's figured out a legal loophole.

Federal prosecutors recently indicted 25 people associated with the Baltimore City Detention Center on charges of racketeering, and drug and money laundering. Prosecutors allege that prison guards allowed gang members free reign over the prison, helping them smuggle drugs and cellphones into the facility. Weekend Edition Saturday host Scott Simon speaks with Baltimore Sun reporter Ian Duncan about the case.

Russia is preparing for the 2014 Winter Games — turning a sleepy valley in the Northern Caucasus Mountains into an Olympic village, with brand-new facilities for every Alpine sport. Officials say it will be a world-class destination for winter-sports enthusiasts long after the Games are over. Environmentalists say it's an ecological disaster in the making.

Francine Segan, author of Dolci: Italy's Sweets, discovered the unusual treat while traveling in Tuscany.