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Photos:People who made it to 100 and beyond
Fauja Singh is recognized as the first 100-year-old to ever run a marathon. The great-grandfather, nicknamed the "Turbaned Tornado," continues to run or walk every day. Now 106, he took up running to overcome his grief after the death of his wife and a son. He ran his first marathon at age 89. The key to life: "Laughter and happiness. That's your remedy for everything."