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(Note at 11:20 a.m. ET: Scroll down to see the GOP plan, which has now been released; new comments from Rep. Ryan; and White House reaction.)

House Budget Committee Chairman Paul Ryan of Wisconsin, the 2012 Republican vice presidential nominee, unveiled his latest budget plan Tuesday morning — and as NPR's Tamara Keith told our Newscast Desk, he says it would bring the federal budget in balance by 2023.

Update at 2:43 p.m. ET. No Pope Today:

Black smoke just poured from the chimney above the Vatican. That means, as was expected, the cardinals did not choose a pope on the first vote of their conclave to name a successor to the now-retired Pope Benedict XVI. As the cardinals' ballots are burned, NPR's Sylvia Poggioli says, chemicals are added to a fire in a second stove to turn the smoke black if there's no pope elected and white if there is.

The daily lowdown on books, publishing, and the occasional author behaving badly.

The mascot for Arizona State is Sparky the Sun Devil, who wore a red costume with horns and a pitchfork. After Disney helped update Sparky, some students found his new look — with big eyes and bulging muscles — creepy.

Mr. Stubbs (his tail was bitten off years ago) was taken in by the Phoenix Herpetological Society. There, The Arizona Republic reports, an orthopedic care specialist realized a silicone tail could be designed for him. Now, Mr. Stubbs sports a $6,000 prosthetic.

As the conclave to select a new pope gets under way at the Vatican, what do American Catholics want from the next pontiff? Renee Montagne speaks with Greg Smith of the Pew Forum on Religion & Public Life about their most recent survey.

Mexico's new president, Enrique Peña Nieto, has been in office for three months, and despite his claims that he's fighting drug violence with a new strategy, there are no signs the situation is any better. The president prefers to focus on Mexico's economic potential and has been touring the country, giving pep talks wherever he goes.

Technology has made it easier than ever to track your activity levels, your sleep cycles, how you spend your time, and more. The self-trackers who near-obsessively capture and analyze their own data are part of a growing "Quantified Self" movement.

Mayor Mike and his public health edicts are having a rough ride.

On Monday, a state judge in Manhattan struck down New York City Mayor Michael Bloomberg's rule capping soda sizes. And lawmakers in Mississippi are taking the backlash against government regulation on food marketing one step further.