President Barack Obama travels to promote the agenda for his second term. American Airlines and US Airways merge. And a Senate showdown begins over the nomination of Chuck Hagel as defense secretary. A panel of journalists joins Diane for analysis of the week's top domestic news stories.

Natasha Trethewey says there’s a poem out there for everyone. Her poetry explores the interplay of race and memory in her life and in American history. She joins Diane to discuss what she hopes to accomplish as the U.S. Poet Laureate.

We explore how Tide detergent became a hot commodity in underground economies around the country, and why authorities are concerned.

Pulitzer Prize-winning author Taylor Branch argues that while we invoke Dr. Martin Luther King, Jr.'s name frequently, few understand the principles he championed or the history of race relations in America.

Natasha Trethewey says there’s a poem out there for everyone. Her poetry explores the interplay of race and memory in her life and in American history. She joins Diane to discuss what she hopes to accomplish as the U.S. Poet Laureate.

As part of our Mind and Body series: More than five million Americans suffer from Alzheimer's, but efforts to find new treatments for the disease have been disappointing. The ongoing battle against Alzheimer's disease.

The story of Abraham Lincoln's rise to greatness in 1862, America's most perilous year.

It's your turn to offer your take on the issues of the day.

We talk with architect Roger Lewis about a critic's role in keeping the public informed and designers honest.

Obama is set to unveil proposals from his task force on reducing gun violence today. Among the recommendations is lifting restrictions on federally funded research of gun violence.