The medical ambulance transporting U.S. Congresswoman Gabrielle Giffords leaves the University Medical Center en-route to Davis-Monthan Air Force Base in Tucson, Arizona January 21, 2011. Giffords will be flown to Texas where she will begin her in-patient rehabilitation, two weeks after she was shot through the head. REUTERS/Joshua Lott (UNITED STATES – Tags: CRIME LAW POLITICS)