TUCSON, AZ - JANUARY 12: President Barack Obama speaks at the event "Together We Thrive: Tucson and America" honoring the January 8 shooting victims at McKale Memorial Center on the University of ... more 
TUCSON, AZ - JANUARY 12: President Barack Obama speaks at the event "Together We Thrive: Tucson and America" honoring the January 8 shooting victims at McKale Memorial Center on the University of Arizona campus on January 12, 2011 in Tucson, Arizona. The memorial service is in honor of victims of the mass shooting at a Safeway grocery store that killed six and injured at least 13 others, including U.S. Rep. Gabrielle Giffords (D-AZ), who remains in critical condition after being shot in the head. Among those killed were U.S. District Judge John Roll, 63; Giffords' director of community outreach, Gabe Zimmerman, 30; and 9-year-old Christina Taylor Green. (Photo by Kevork Djansezian/Getty Images) less 
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Getty Images | Photo By Kevork Djansezian / Getty Images
Thu, Jan 13, 2011 3:24 AM EST