Talk of The Nation

Transcript

CELESTE HEADLEE, HOST:

This is TALK OF THE NATION. I'm Celeste Headlee, in Washington. Neal Conan is away. At the urging of local groups, President Obama went home to Chicago last week to talk about urban violence in a city that recorded more than 40 murders just last month, among them the high-profile killing of Hadiya Pendleton.

Transcript

CELESTE HEADLEE, HOST:

This is TALK OF THE NATION. I'm Celeste Headlee, filling in for Neal Conan from Washington. These days Facebook and Twitter are almost ubiquitous, and online our friends and family members are just as likely to talk about their jobs as their children and spouses.

Transcript

CELESTE HEADLEE, HOST:

This interview was originally broadcast on Dec. 13, 2010.

The HeLa cell line — one of the most revolutionary tools of biomedical research — has played a part in some of the world's most important medical advances, from the polio vaccine to in vitro fertilization.

Transcript

NEAL CONAN, HOST: