A study released by the National Sleep Foundation found that 30 percent of American workers are very sleepy at work due to insufficient rest. Meg Oliver reports.
(CBS) Feeling tired? Losing an hour of sleep on the first morning of Daylight Saving Time will do that to you. And for plenty of busy folks these days there's little chance that they'll ever make it up. Just ask our early-to-rise Charles Osgood, who's left us our Sunday Morning Cover Story:
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