The morning after a stinging defeat in South Carolina, former Massachusetts Gov. Mitt Romney said he would release his most recent tax returns this week, ahead of the Florida primary.

Romney said he would release his 2010 tax returns and an estimate of what he'll pay for 2011 on Tuesday. "We made a mistake in holding off as long as we did," he told Fox News Sunday.

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RACHEL MARTIN, HOST:

This is WEEKEND EDITION from NPR News. I'm Rachel Martin.

The Republican presidential nominating contest is now in full swing - emphasis on swing. Three states have voted, each anointing a different winner. Yesterday, South Carolinians had their say, and they picked Newt Gingrich. Mitt Romney was a distant second, with Rick Santorum and Ron Paul third and fourth.

We have reports from all four campaigns, starting with NPR's Tamara Keith at Gingrich headquarters last night.

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RACHEL MARTIN, HOST:

Reporter Joanna Kakissis traveled to the province of Thrace, in northern Greece, to look into a religious controversy. What she found, like so much in Greece these days, was a story about the sad state of the economy.

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JOANNA KAKISSIS, BYLINE: Recep Pacaman greets friends at his family home in the village of Komotini. The male visitor is wearing a prayer cap; the woman, a dark headscarf.

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Klubradio is one of Hungary's only remaining independent broadcasters, but it may soon go silent. The station's struggles are emblematic of the Hungarian government's crackdown on civil liberties. The European Union is so worried that last week it issued a warning to Hungary: Revise your new constitution to comply with EU laws or leave the EU.

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RACHEL MARTIN, HOST:

That brings us to our next story: the potential for governments - from dictatorships to democracies - to exploit technology to spy on their own citizens. John Villasenor is a fellow at the Brookings Institution, and he's written a paper on how governments may soon be able to record much of what is said or done within their borders - every phone conversation, electronic message, Facebook post, tweet and video from every street corner - and then store that information indefinitely.