In a wide-ranging discussion with All Things Considered's Robert Siegel, Ron Paul, the Republican congressman from Texas, said of all the GOP hopefuls, he's been the steady one.

"All I know is that the message is powerful," he said in response to a question about the viability of his campaign. "The message is well-received. Our numbers are growing, and we don't go up and down like a yo-yo."

The Keystone XL pipeline is supposed to connect Canada to Texas. But does it also have to connect to a payroll tax holiday?

White House Senior Advisor Valerie Jarrett, speaking today on NPR's Tell Me More, said no link should be made because the oil pipeline is not "germane" to legislation involving a tax holiday.

In Los Angeles, the center of the U.S. adult film industry, condom use during the making of porn films will soon be required.

Mayor Antonio Villaraigosa signed the controversial ordinance into law this Monday.

Now it's up to the L.A. city clerk to post the new rule, which could happen this week, the Associated Press reports. After the posting, the rule would take effect in 41 days.

Filmmakers would have to agree to comply with the requirement to get a permit to make a movie.

The "Blue Marble" image of Earth snapped by the crew of Apollo 17 in 1972 is one of the most famous photos ever taken. When it appeared, we all suddenly saw the world in a much different way.

In the years since, NASA has added other "Blue Marble" photos to its collection, and has used technology to enhance and sharpen the images.

The economy "has been expanding moderately, notwithstanding some slowing in global growth" in recent weeks, the Federal Reserve just reported.

In a statement timed for release at the end of their most recent meetings, Fed policymakers also said they expect economic growth in coming quarters "to be modest," that the jobless rate will "decline only gradually" and that inflation will run "at ... or below" levels the central bank wants to see.

Maybe you've never heard of Kris Kobach. To hear some immigration advocacy groups tell it, however, Kobach is going to cost Mitt Romney the Hispanic vote and — should Romney become the Republican nominee — the election.

Kobach is serving as the Kansas secretary of state. He remains better known in some quarters for his work as an adviser to legislators around the country drafting immigration laws — including the 2010 Arizona law that is being reviewed by the Supreme Court this spring.

Less salt and fat. More whole grains, fruit, veggies and low-fat dairy. This is what kids can expect in the school lunchroom soon, according to new nutrition standards for school meals announced today by the U.S. Department of Agriculture and first lady Michelle Obama.

Europe does not now have the "political structures" to make the euro work properly, German Chancellor Angela Merkel told world leaders today.

At the World Economic Forum in Davos, Switzerland, The Associated Press reports, "she said the weaknesses 'arose over years — so they can't be overcome at one fell swoop.' "

But, Merkel added, "we are determined to do this."

On Tuesday, President Obama delivered his final State of the Union address of his four-year term. It largely focused on growing the nation's economy. Host Michel Martin talks with two members of Congress who sat next to each other during the address: Rep. Michael Grimm, R-N.Y., and Rep. Loretta Sanchez, D-Calif.

Host Michel Martin speaks with White House Senior Adviser Valerie Jarrett about President Obama's State of the Union speech. Jarrett discusses job loss and growth, and says America is moving in the right direction when it comes to combating unemployment.