President Obama hugs NASA astronaut Mark Kelly, husband of U.S. Rep. Gabrielle Giffords, who remains hospitalized after being shot Saturday. ()
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Thousands crowd into the McKale Memorial Center for the event, dubbed "Together We Thrive: Tucson and America." ()
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A group mourns during the service. ()
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A woman is comforted at the University of Arizona's McKale Center. ()
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President Obama greets family members of shooting victims during the memorial event. ()
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President Obama speaks to a crowd of 14,300 in the McKale Memorial Center, while another 13,000 watch on big screens in the nearby football stadium. ()
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President Obama said it was important for Americans to pause to make sure "we are talking with each other in a way that heals, not in a way that wounds." ()
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The Obamas stand next to Giffords' intern, Daniel Hernandez, who was honored as a hero at the event. Arizona Gov. Jan Brewer said Hernandez's quick actions probably saved Giffords' life. Hernandez rushed to help the congresswoman after she was shot. ()
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People wait in line for the memorial service at the University of Arizona campus in Tucson. ()