Talk of the Nation

The trial of Jodi Arias, convicted of murdering her boyfriend, has become a national media sensation. Former Law and Order producer Robert Nathan and authors Laura Lippman and Walter Mosley explore why Americans are so drawn to real-life courtroom dramas.

Retailers are under pressure after a building collapse killed more than 1,100 garment workers in Bangladesh. But global demand for inexpensive clothing shows no sign of abating. The New York Times' Steven Greenhouse and Elizabeth Cline, author of Overdressed: The Shockingly High Cost of Cheap Fashion, unravel the prospects for improved safety in the garment industry.

David Matsumoto, a psychology professor at San Francisco State University, trains national security officials and police officers to recognize "microexpressions"--fleeting, split-second flashes of emotion across someone's face. Matsumoto says those subtle cues may reveal how an interview subject is feeling, helping officials to hone their line of questioning.

How long can you go without checking email, or glancing at your smartphone? Clifford Nass, a psychology professor at Stanford University, says today's nonstop multitasking actually wastes more time than it saves--and he says there's evidence it may be killing our concentration and creativity too.

Saul Perlmutter shared the 2011 Nobel Prize in physics for his discovery that the universe was expanding at an accelerating rate. Perlmutter explains how supernovae and other astronomical artifacts are used to measure the expansion rate, and explains what physicists are learning about "dark energy" — the mysterious entity thought to be driving the acceleration.