Arizona Shooting Update: Mourners Gather for 9-Year-Old Christina Green

TUCSON, Ariz. (CBS/AP) The casket for Christina Taylor Green seemed too small to hold the grief and despair of the 2,000 mourners who packed into St. Elizabeth Ann Seton Church on Thursday to say goodbye to the 9-year-old girl whose life began and ended with two of the nation's most soul-searching moments.

PICTURES: Arizona Shooting Victims

Reminders of the innocence of the bubbly girl born on Sept. 11, 2001 were everywhere: A group of little girls dressed in frilly dresses and white tights craned to see as their friend's casket rolled into the church and Christina's best friend sneaked them a wave from her place in the processional line.

Outside the church, more little girls -- and hundreds of other people -- wearing white and waving American flags lined both sides of the street for more than a quarter-mile to show their support. Hundreds of motorcycle riders from all over stood guard and more than a dozen residents were dressed as angels.

Before the service, Christina's family and closest friends gathered under the enormous American flag recovered from Ground Zero and paused for a moment of silence, holding hands and crying. White-gloved state troopers escorted family and dignitaries into the church as a choir sang hymns.

"She would want to say to us today, 'Enjoy life,"' said Bishop Gerald Kicanas, who presided over the funeral. "She would want to say to us today, 'God has loved me so much. He has put his hand on me and prepared a place for me."'

As Christina's family grieved, new developments emerged in the case when a man walking his dog found a black bag containing ammunition that authorities believe was discarded by the suspected gunman, 22-year-old Jared Loughner.

Green was one of six people killed when, according to police, 22-year-old Jared Loughner opened fire Saturday at congresswoman Gabrielle Giffords' meet-and-greet event at a busy supermarket. The third-grader's funeral is the first for those slain.

COMPLETE COVERAGE OF THE ARIZONA SHOOTING FROM CBS NEWS