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President Obama has chosen one of Africa's most stable democracies for his first official visit to the continent. Africa watchers hope he'll outline his foreign policy for Africa in a speech to Ghana's Parliament.

Violence escalated in Baja California this week as three police officers from Tijuana and Rosarito were killed in less than 24 hours. The killers have threatened to murder five police officers a week until Tijuana's police chief resigns.

The state budget stalemate continues, with no resolution in sight. Earlier this week, Democratic lawmakers walked away from talks aimed closing the state's $26.3 billion deficit. Now, the governor is proposing a 20 percent wage cut for state employees.

A lasting worldwide economic recovery "is still a ways off," President Obama declared Friday, but he also said at the conclusion of a global summit that a disastrous economic collapse apparently has been averted.

A New DVD Release of Kathryn Bigelow's Near Dark Tries to Cash in on Twilight Frenzy

President Obama and the other G-8 leaders meeting in Italy agreed to try to limit the global increase in temperature. But the developing countries refused to set a numerical target for limiting their own greenhouse gases. Experts say without cooperation from developing countries, no effort to fight climate change can succeed.

Hepatitis C is the most common blood-borne infection in the U.S., affecting four million Americans. We'll explore the cost of the disease to society, and how clean needle exchange programs can prevent its spread.

Targeting global warming, President Barack Obama and other leaders of the world's richest industrial countries pledged Wednesday to seek dramatic cuts in greenhouse gas emissions by 2050 to slow dangerous climate change. Setting a marker for success, they agreed for the first time that worldwide temperatures must not rise more than a few degrees.

New York City has more IV drug users than any other city in the U.S. To prevent the spread of blood-borne diseases like hepatitis C, it has a wide network of clean syringe exchange programs.

The coordinated attacks that swamped Web sites in the U.S. and South Korea in the past several days may be a harbinger of things to come, cybersecurity experts say.