Former Rep. Gabrielle Giffords, center, looks at a photo of Christina-Taylor Green, as it is held by her mother Roxanna Green, left, as Giffords' husband Mark Kelly prepares to speak as they all returned to the site of a shooting that left her critically wounded, and many others killed, including the nine-year-old Green, to urge key senators to support expanded background checks for gun purchases, Wednesday, March 6, 2013, in Tucson, Ariz. (AP Photo/Ross D. Franklin)
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