The memorial service with President Obama is one of a number taking place in Arizona and around the country. The youngest victim was nine-year-old Christina Taylor Green, a third-grader recently elected to the student council at her elementary school. The husband of Susan Hileman, a family friend who escorted Christina to the event and was herself wounded in the shooting, said his wife remains in shock.

Bill Hileman: “I hear her in her semi-conscious ramblings screaming out, 'Christina! Christina! Let's get out of here! Let’s get out of here!’ And she keeps talking about the holding of hands and then the realization that she was on the ground and the bleeding was profuse. Her memory seems to end there.”