Too much cancer screening, too many heart tests, too many cesarean sections. A spate of recent reports suggest that too many Americans -- maybe even President Barack Obama -- are being overtreated.

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• S.F., L.A. transit projects may be U.S. models
• Appeals Court says 'under God' not a prayer
• Senators question $1 million pay for charity's CEO
• Nation

Mayor Gavin Newsom finally put an end to the questions of will he or won't he, and announced this morning that he is running for lieutenant governor.  John Coté

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• Obama delays Asia trip to deal with health care
• State GOP goes into convention 'on the offense'
• Politics

A huge swath of Wine Country, including vineyards where some of the world's best grapes are grown, was quarantined this week after an invasive moth was discovered.  Peter Fimrite

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• S.F. police turn elsewhere for drug-test help
• Fishermen likely to see limited salmon season
• Bay Area/California

Retail sales posted a surprising increase in February as consumers did not let major snowstorms stop them from storming the malls. The advance, the biggest since November, provided hope that the recovery from the Great Recession is gaining momentum.

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• Obama wants S.F.'s Yellen as Fed vice chair
• Chevron wins bid for Ecuador arbitration
• Business

Video game publishers have worked hard to plunge players into beautifully constructed realities. But a new wave of titles is leveraging augmented reality technology to set games in the most immersive environment yet. Ryan Kim

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• No .xxx yet: Internet agency delays porn decision
• Intel invests in social media incubator Betaworks
• Technology

The Oakland mother accused of suffocating her 2-year-old daughter suffered from mood swings and depression, her mother said Thursday.  Henry K. Lee

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• Daly City man accused of running down victim
• Doctor caught in TV molest sting gets jail
• Crime