Host Michel Martin discusses trends at this year's auto expo in the Motor City, and what U.S. automakers are doing to capture another year of double-digit profits. She speaks with NPR Business Reporter Sonari Glinton and Michelle Krebs of Edmonds.com, a car industry tracking site.

Metal detectors just don't cut it when it comes to keeping shards of bone or plastic and other nasty stuff out of food. Enter the X-ray. Costco and other big retailers now require food processors to X-ray food to screen for foreign objects. The process is more automated than airport baggage screening.

New York Times Washington correspondent Jodi Kantor interviewed more than 200 sources, including White House aides and friends of the Obamas, to paint a portrait of the first family's life inside the White House.

Last month, a passenger was traveling with the cupcake packed into a jar filled with icing. Too much icing says the Transportation Security Administration. In its blog, the agency explained icing counts as a gel, and some gels can be used to make explosives.

Blue Ivy Carter is only days old, yet the proud father released a song called "Glory." In the song, Jay-Z raps that his daughter is "the most beautiful thing in the world." The newborn chimes in with a few cries at the end of the song.

Five candidates spent Monday campaigning in the state. And we now hear from five NPR reporters, covering those candidates. They include: Ari Shapiro on Mitt Romney, Robert Smith on Ron Paul, Andrea Seabrook on Newt Gingrich, Don Gonyea on Rick Santorum and Tovia Smith on Jon Huntsman.

You can never be too thin seems to be the mantra at this year's Consumer Electronics Show in Las Vegas. Ultra-thin laptops and slender next-generation TVs are being showcased along with thousands of other gadgets and gizmos. The show is so massive that if you walked from booth to booth you would travel more than 15 miles.

Spouses can play an important role for a presidential aspirant. Often, they humanize the candidate. Sometimes, they serve the campaign as powerful surrogates. Other times, they turn off voters.