as barry pederson will report in our sunday morning cover story. reporter: what if you could add a decade to your life just by changing your diet and making new friends? that s the buzz in longevity circles thanks to research. how close? i see in terms of the choices we make, we can do this today. reporter: answers to an age-old question coming up this sunday morning. osgood: coming home is a story from our mark strassman about one woman s determination and compassion. yeah, i mean, when you get 19 acres of land, you can build your dreamompletely without compromising any part of it. reporter: she has always had an american dream. not just for herself but for hundreds of kids who came to the united states as war refugees. i think a lot of people take being an american for granted. all of us came to this country for a better life, for a fresh start, to live the american dream. congratulations, new citizens. reporter: what it really means to be an american citi