Gabrielle Giffords moved

TucsonHealthGabrielle GiffordsHouston
Tucson police escort an ambulance with U.S. Rep. Gabrielle Giffords (D-AZ), during her transfer from the University Medical Center on January 21, 2011 in Tucson, Arizona. Giffords is being moved to Memorial Hermann Hospital in Houston Texas. John Moore/Getty Images
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