Rep. Gabrielle Giffords (D-Ariz.) and her husband, Mark Kelly, as they recited the Pledge of Allegiance at Sunday's memorial service in Tucson. Ross D. Franklin/AP hide caption

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Captain Mark Kelly hugs his wife, Rep. Gabrielle Giffords (D-Ariz.) at the White House in October. The White House/Getty Images hide caption

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Suzi Hileman inspects an aloe on her front porch on Wednesday, Aug. 24. Ron Medvescek/Courtesy Arizona Daily Star hide caption

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Mark Kelly has a new book about his wife, Rep. Gabby Giffords, and her road to recovery since she was shot in the head on Jan. 8. Courtesy of P.K. Weis hide caption

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Rep. Gabrielle Giffords last May. P.K. Weis/Facebook.com/GabrielleGiffords hide caption

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Taken on May 17, this photo of Rep. Gabrielle Giffords (left) and her mother, Gloria Giffords, was posted on her Facebook page on June 12. P.K. Weis/Facebook.com/GabrielleGiffords hide caption

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Rep. Gabrielle Giffords, in a recent photo. It was posted on her Facebook page earlier today (June 12, 2011). P.K. Weis/Facebook.com/GabrielleGiffords hide caption

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In this Jan. 5, 2011 file photo, Rep. Gabrielle Giffords, D-Ariz., takes part in a reenactment of her swearing-in, on Capitol Hill in Washington. Susan Walsh/AP hide caption

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