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The Census Bureau of the United States predicts that by the year 2030 one in four US citizens will be over 65 years of age. Out of necessity and with good health, this multi-talented age group will be visibly present in the work force. This entertaining New York Times report covers hardworking old folks in their 80s, 90s and even 100s, including one who continues to operate heavy equipment at a quarry. In 1900 there were only 63,000 centenarians. Halfway through the 21st century, this number is expected to reach 834,000.