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US President Barack Obama and First Lady Michelle Obama disembark from Air Force One as they arrive at Davis-Monthan Air Force Base in Tucson, Arizona, on January 12, 2011 to attend the memorial event Together We Thrive: Tucson and America at the University of Arizona Tucson to support and remember victims of the mass shooting in Tucson. The First Couple will attend a tribute service for the six people who were killed and the 14 wounded in the assassination attempt on congresswoman Gabrielle Giffords, who is fighting for her life in a hospital.
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U.S. President Barack Obama and first lady Michelle Obama step off Air Force One at Davis-Monthan Air Force Base in Tucson, Arizona, January 12, 2011.
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Security personnel keep vigil as US President Barack Obama and First Lady Michelle Obama disembark from Air Force as they arrive at Davis-Monthan Air Force Base in Tucson, Arizona, on January 12, 2011 to attend the memorial event Together We Thrive: Tucson and America at the University of Arizona Tucson to support and remember victims of the mass shooting in Tucson. The First Couple will attend a tribute service for the six people who were killed and the 14 wounded in the assassination attempt on congresswoman Gabrielle Giffords, who is fighting for her life in a hospital.
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U.S. President Barack Obama and first lady Michelle Obama greet military personnel after stepping off Air Force One at Davis-Monthan Air Force Base in Tucson, Arizona, January 12, 2011
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U.S. President Barack Obama greets military personnel after stepping off Air Force One at Davis-Monthan Air Force Base in Tucson, Arizona, January 12, 2011.
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President Barack Obama and first lady Michelle Obama greet onlookers Wednesday, Jan. 12, 2011 upon arrival at Davis-Monthan Air Force Base in Tucson, Ariz. The Obamas are in Tucson to pay tribute to the six people killed in the weekend shootings and to the fighting spirit of wounded lawmaker Gabrielle Giffords, the target of the first assassination attempt on a member of Congress in decades.
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Arizona Governor Jan Brewer and Rep. Raul Grijalva await the arrival of President Barack Obama and first lady Michelle Obama on Wednesday, Jan. 12, 2011 at Davis-Monthan Air Force Base. The Obamas are in Tucson, Az. to attend a memorial service at the University of Arizona for the six people who died in Saturday's mass shooting that left Rep. Gabrielle Giffords, D-Ariz. in critical condition.
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President Barack Obama and first lady Michelle Obama greet Arizona Gov. Jan Brewer as they arrive in Tucson, Ariz. , to attend a memorial service for victims of last Saturday's shooting rampage that killed six people and left 14 injured, including Rep. Gabrielle Giffords, at Davis-Monthan Air Force Base, Wednesday, Jan. 12, 2011.
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U.S. President Barack Obama greets Arizona Governor Jan Brewer after stepping off Air Force Base in Tucson, Arizona, January 12, 2011.
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U.S. President Barack Obama greets Arizona Governor Jan Brewer after stepping off Air Force Base in Tucson, Arizona, January 12, 2011.
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President Barack Obama greets Arizona Gov. Jan Brewer as he arrives in Tucson, Ariz. , to attend a memorial service for victims of last Saturday's shooting rampage that killed six people and left 14 injured, including Rep. Gabrielle Giffords, at Davis-Monthan Air Force Base, Wednesday, Jan. 12, 2011.