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1/16: "What Addicts Know" excerpt, biathlete sisters, more

Find more information about the following stories featured on TODAY:Read an excerpt from Christopher Kennedy Lawford's book, "What Addicts Know."U.S. biathlete Tracy Barnes discusses giving her spot on the Olympic team to her sister, Lanny.Shine a Light: TODAY anchors reach out to those in need. Track our anchors' progress and learn how to help on Facebook.Which community should TODAY's weekend t

Find more information about the following stories featured on TODAY:

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