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U.S. troops in Baghdad are expanding operations, with Iraqi soldiers and police trying to bring security to some of the capital's most dangerous districts. Among the U.S. units involved is the Tomahawks Battalion of the 172nd Stryker Brigade Combat Team, based in Alaska. The Strykers are part of the front line, getting tips, clearing houses, and working neighborhood by neighborhood to bring the city under control.

California's legislature has approved the country's first statewide cap on global warming pollution. The measure would require that the state reduce its emissions to 1990 levels by 2020. Governor Arnold Schwarzenegger is expected to sign it.

This year marks the 70th anniversary of the start of the Spanish Civil War. In Spain, there are no official commemoration ceremonies. That's in keeping with the silence with which Spaniards have generally treated the war - and the Franco dictatorship that followed. But many, including now elderly children of victims, are increasingly seeking some kind of closure.

A study of deaths in the Central Valley during a record heat wave shows many of the deaths were preventable.

Residents of Nanjie village have almost no money and virtually no private possessions, yet their village is the wealthiest in China's Henan Province. Everything in Nanjie is collectively owned, and the government redistributes everything -- from food, housing and health care to cell phones and broadband -- more or less equally.

Thousands of Cuban Americans in South Florida await more news about Fidel Castro. U.S. authorities are preparing for a possible exodus of Cubans headed to Florida -- and Cuban Americans headed to their homeland.

Three years ago this month, an elderly man with health problems lost control of his car and tore a deadly path through the Santa Monica Farmers' Market. Ten people were killed, 60 others were injured. The 89-year-old driver finally is about to face trial on 10 felony counts of vehicular manslaughter.

Successful aging is not a passive sport. For example, genes are only about 50 percent responsible for our memory. It's believed the other half is determined by environment and behavior. Researchers

Another day of record-breaking heat puts more stress on California's already stressed power grid. Even as businesses and the public try to conserve, there's still a chance that power regulators will be forced to call for rolling blackouts. California has suffered through more than a week of triple-digit temperatures.

Israel's bombing campaign has displaced more than 600,000 Lebanese -- a humanitarian disaster, says the United Nations. Aid agencies are concerned about getting help to people who can't evacuate from dangerous areas.