For enlightenment, we turn to the journalist's proverbial first source, a taxi driver.

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This heritage is an irreplaceable source of identity and a driver of future development and cohesion.

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If the Republicans made a strategic decision to pursue growth, health care would become a source of economic growth rather than a driver of deficits.

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Mr Osborne did not condone his driver's parking decision, the source added.

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The source said one of the men detained was a driver for one of the women, according to the French daily Liberation.

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Black boxes have been a source of info in countless criminal cases to show how fast a driver was going when he or she slammed into pedestrians or another car.

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The suspects tell the driver they are the Boston marathon bombers, a law enforcement source told CNN's Joe Johns.

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When the camera detects a heat source in the shape of a human being, the on-board computer alerts the driver by highlighting the pedestrian in yellow on the dashboard screen.

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While retail sales have remained a source of concern for most apparel retailers in 2011, e-commerce has been a major growth driver for the apparel sector.

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On inflation, the Fed chairman said that while high energy prices continue to be a source of risk, ongoing productivity gains in the labor market should keep wage increases--still the biggest driver of overall inflation--under control.

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