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The United States is backing production of an experimental human vaccine against bird flu for stockpiling in case the current virus mutates and starts a global pandemic. But it's not clear how useful the vaccine would be if a pandemic occurs.

As the world waits for definitive news about Israeli Prime Minister Ariel Sharon, he remains in serious condition at a Jerusalem hospital. Doctors will begin bringing him out of a drug-induced coma on Sunday. They offer scant hope for a full recovery.

Iraq is not far from breaking up the way other multi-ethnic states such as the Soviet Union and Yugoslavia have, says Peter Galbraith, a former U.S. ambassador to Croatia. He argues that the country's constituent components -- the Shia, Sunnis and Kurds -- are already de facto independent.

The cowboy love story Brokeback Mountain leads the Oscar pack with a total of eight nominations, including Best Picture and Best Actor for Heath Ledger. Madeleine Brand talks with Claude Brodesser, host of the public radio program The Business, about the Academy Award nominees announced Tuesday morning. The awards ceremony will be held March 5 in Los Angeles.

President Bush vows in his State of the Union speech to increase funding to develop coal-fired power plants that produce no polluting emissions. But the federal government is currently undermining efforts by states to require power companies to use an existing "green" technology that's already available.

With their identities concealed, witnesses in the trial of Saddam Hussein give chilling testimony on torture and deprivation in Iraqi prisons. The former Iraqi leader, who faces crimes against humanity, vowed he would not return to the "unjust" court in Baghdad.

Day to Day profiles hip-hop artist Supernatural, who rose to prominence as an improvisational "freestyle" artist. The rapper is expanding into written music with his new album S.P.I.T.

In Africa, almost a half-million children died last year of AIDS. Hundreds of thousands of others are in need of treatment. But very few get it because the barriers to treating children are even greater than those for adults.

A Jewish man in California's San Quentin State Penitentiary fights to have his inmate status changed from "white" -- a designation that sometimes groups him with violently anti-Semitic prisoners.

Of all the groups in the micro-melting pot of South Louisiana hit by Hurricane Katrina, it's hard to find a more close-knit community than the Islenos. The descendants of Spanish-speaking Canary Islanders who settled St. Bernard Parish more than 200 years ago are now struggling to restore a community that was dispersed by Katrina's winds and floods.