National and World News from NPR

On Tuesday morning, space shuttle Discovery will become the first of NASA's three shuttles — plus a shuttle prototype — to travel to its new retirement home.

NASA flew its last shuttle flight in July. Since then, it's been prepping the spaceships to become museum displays. And even though the shuttles are headed to places like Los Angeles and New York rather than the space station, figuring out how to get them there has still been a major undertaking.

First lady Michelle Obama wears many hats in the White House. In addition to being President Obama's closest confidante, she's also a mother whose two daughters are growing up in one of the most public homes in America.

And as first lady, Mrs. Obama has taken on her own signature public issues, as well.

Her Let's Move campaign has brought attention to the growing epidemic of childhood obesity. She has encouraged children to eat right and get plenty of exercise.

Chin up. Literally.

A big group of plastic surgeons say that chin enhancement was the fastest growing surgical procedure they performed for cosmetic purposes in the U.S. last year — up 71 percent to 20,680 operations.

Now, it's still a small number, overall, compared with breast augmentation, the No. 1 procedure at 307,180. But those surgeries rose only 4 percent in 2011 compared with 2010.

Chin work was most popular out west, which is true for most cosmetic procedures. The Northeast came in second.

The Secret Service, which has been offering protection to presidents since 1902, has long enjoyed one of the most sterling reputations of any government agency.

That reputation has been tarnished by allegations that agents hired prostitutes in Colombia in advance of President Obama's trip there.

Saxophonist Andrew Love of the Memphis Horns has died. Love, who had Alzheimer's disease, died on April 12 at his home in Memphis. He was 70 years old.

(The awards were announced just after 3 p.m. ET.)

For its "distinguished ... reporting on significant issues of local concern," reporter Sara Ganim and The Patriot News of Harrisburg, Pa., have won a 2012 Pulitzer Prize for uncovering the so-called Penn State scandal.

Other prize winners, which were just announced, include:

The United Nations Security Council issued a strong condemnation after North Korea's failed satellite launch attempt. Such condemnations were also issued in 2006 and 2009. In a piece in Foreign Affairs, Dartmouth College government professor Jennifer Lind argues that North Korea gets too many second chances.

Want extra salt with that fast-food meal? Then buy it in the United States, where chicken dishes, pizzas, and even salads are loaded with far more salt than in Europe and Australia, according to new research.

The McDonald's Chicken McNuggets in the United States have more than twice as much salt as their sister nuggets in the United Kingdom. That's 1.6 grams of salt for every 100 grams of American nugget, compared with 0.6 grams in the U.K.

The World Bank's executive directors have chosen Dr. Jim Yong Kim to be the development agency's next president.