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Before Neil Armstrong walked on the moon, he had to solve a more prosaic problem.

A study, which started back in 1987, shows that monkeys fed a diet with 30 percent fewer calories than normal did not live unusually long lives. Researchers say the results are a good indication of how caloric restriction might affect the life spans of people.

The more than $3.5 billion deal was signed during a visit to China by German Chancellor Angela Merkel.

About 30 miles west of New Orleans, St. John the Baptist Parish was flooded quickly from two lakes, including Lake Pontchartrain. Hurricane Isaac's strong winds created a surge — forcing water into residential areas and evacuations of thousands of people.

David Greene talks to Ina Fried, a senior editor at the website All Things Digital, about the next steps for Samsung after it lost a patent lawsuit to Apple.

Turkey's foreign minister plans to ask the U.N. Security Council to establish a safe zone inside Syria for refugees fleeing the war there. With close to 100,000 refugees already in camps on Turkish territory, the foreign minister says his government lacks the capacity to host more.

Forecasters warned the storm could still cause "life-threatening hazards." Isaac is forecast to continue moving slowly and dump up to 14 inches of rain across a wide swath of the south and midwest.

On Medicare, the stimulus and a story about the GM plant in his hometown, the GOP vice presidential nominee got some facts wrong, according to the news outlets and nonpartisan watchdogs that parse politicians' words.

The agent was pulled from the security detail and the Secret Service said they take this "very seriously."

Each presidential candidate is pushing harder to make the case that he would be a better leader for the economy. But technological innovations (such as those by Bill Gates), new business practices, global political shifts and social changes may shape the economy more than a president's policies.