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In a role reversal, China is flexing its political and economic muscle against the United States by threatening sanctions against American companies involved in selling arms to Taiwan. China is pushing back on a raft of other contentious issues, from sanctions against Iran to President Obama's plan to meet with the Dalai Lama.

One of the largest and potentially most damaging hurricanes to hit the East Coast in decades is heading slowly north. The storm is expected to pass right over New York City and into New England later this weekend. At least four storm-related deaths have been reported, and more than 630,000 homes and businesses are without power.

How have modern technologies like computers and cell phones changed the brains of young people? What are the benefits and downsides of the newly evolving brain wired on microprocessors and limitless information? We'll explore these issues with a UCLA brain and memory expert.

The nation's top intelligence official told Congress that al-Qaida's terrorist network still has the capability to strike inside the U.S. He also issued a sharp new warning on an alarming rise in cyberattacks against government and private computer systems.

A mentor who can relate to your background can be useful in helping you get ahead. But that is hard to come by for many entry- and midlevel employees who are minorities. Private minority-run coaching firms are now cropping up to fill the void.

San Diego’s fire department has been operating under a money saving strategy for about a month. Under the plan, up to eight fire engines can be idled each day and their crews reassigned to cover for sick or absent firefighters.

The Federal Communications Commission should adopt standards that mandate an Internet that is accessible to everyone on the same terms with no legal content blocked, its chairman said. In a speech at the Brookings Institution, Julius Genachowski strongly backed principles of "network neutrality."

How does San Diego County's Board of Supervisors compare to the state's 57 other boards? What we thought would be a simple demographic survey turned out not to be so simple.

To avoid the crowds at Niagara Falls, why not sail the Great Pacific Garbage Patch, or ogle oil refineries in Port Arthur, Texas? In Visit Sunny Chernobyl: And Other Adventures In The World's Most Polluted Places, Andrew Blackwell describes traveling to the world's most contaminated destinations.

The web site, USA.gov has a treasure-trove of information -- but it can be overwhelming. We'll hear about a "hack day" event, taking place this week in San Diego, aimed at making it easier to use government information.