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Casting health care overhaul as a legacy for the American people and failure as politically unthinkable, President Obama on Sunday rallied Senate Democrats to deliver on their party's half-century quest to expand the social safety net by providing access for all.

On December 4, University of California San Diego researchers completed a 53-hour procedure methodically slicing and sectioning an entire human brain. The process was recorded and broadcast via live webcast. Viewers blogged, tweeted and debated the ethics of the experiment, communicating with researchers, all in real time.

George W. Bush did something today that he hadn't in 66 months as president -- he vetoed a bill passed by Congress. The legislation would have eased restrictions on federal funding for embryonic stem cell research. President Bush imposed the restrictions in 2001.

The County Board of Supervisors unveiled its budget plan for the upcoming year, and it calls for $145 million in cuts and the elimination of nearly 600 positions. We speak to KPBS reporter Joanne Faryon about why the budget is being reduced, and what programs are on the chopping block.

What defines a concussion? And, what are the potential effects of repeated concussions on the brain? We speak to a pair of local experts about the long- and short-term effects of concussions, the latest NFL rules changes, and the challenges to identifying when a person has suffered a concussion.

Last week, a 15-year-old Encinitas girl told her parents and police that she'd been kidnapped and raped by three latino men. Before she admitted that the entire story was fabricated, the police had conducted an intense manhunt in a community already on high-alert after the murders of teenagers Chelsea King and Amber Dubois. It turned out, the minor had sex with a 20-year old man she met online. He is now in jail. But the story raises questions of how false accusations like this impact communities of color -- already vulnerable to institutionalized racism.

Richard Vaughn's dad was a sailor and his grandfather was a Marine. But an interest in tanks drew him to the Army. On April 7, on the first patrol of his second tour in Iraq, his Baghdad convoy was en

Nearly 5 percent of Americans are taking drugs to treat heartburn and acid reflux. A recent study gave the drugs to people who didn't have stomach problems to begin with. Nearly half developed "rebound" acid reflux after taking the drugs for 12 weeks.

Cannabis, or hemp, has been grown in the U.S. since the days of George Washington. But it has been prohibited for personal or recreational use since 1913. We look at the remarkable history of marijuana in this country, including its early reputation for making users violent and insane, up to present-day efforts to legalize it.

Possible locations for a permanent homeless shelter are working their way through San Diego city government. KPBS Political Correspondent Gloria Penner has a few suggestions to add to the mix.