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How Exercise Might Help Keep Alzheimer's At Bay

Sen. Richard Lugar has competed in the Capital Challenge 5K race every year for 29 years.  Above, he crosses the finish line in 2008 at the age of 76.
Sen. Richard Lugar has competed in the Capital Challenge 5K race every year for 29 years. Above, he crosses the finish line in 2008 at the age of 76.

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