Sunday marked one year since a gunman in Tucson, Arizona, killed six people, and wounded 13 others -- including Congresswoman Gabrielle Giffords.
Saturday night, Giffords enjoyed a first night out in her hometown, accompanied by her mother, Gloria.
On Sunday, she received a call from President Obama, who called her recovery "incredible."
CBS News correspondent Ben Tracy reports that Tuscon itself is also still healing.
Erin Buchanan and her 11-year-old son, Kenneth, were busy hanging up bells around Tucson this morning - symbols of hope.
"Hope, faith...hope that it's not going to happen again," Kenneth said.
They headed to the Safeway grocery store - the site of the shooting - so at 10:11 a.m., the moment of the shooting, they and so many in Tucson could remember.
"Healing a lot of healing has happened in the last year. It's nice to see that healing come full circle," Erin Buchanan said.
It's a far different sound from one year ago, when in 16 seconds 31 bullets shattered a sunny Tucson morning. At the grocery store, a simple memorial now stands: A boulder symbolizing Tucson's unbreakable spirit surrounded by six smaller rocks for those who were lost: Giffords' young aide Gabe Zimmerman, federal judge John Roll, Phyllis Schneck, Dorwan Stoddard, Dorothy Morris, and Christina Taylor Green, who was just 9 years old.
Congresswoman Giffords, who was shot in the head, has been recovering in Houston. But she and husband Mark Kelly were back in Tucson this weekend, returning to the Safeway for the first time since the shooting, dedicating a memorial in her office to Gabe Zimmerman and visiting a trailhead named in his honor.
Mark Kelly says they have received nearly 30,000 get-well cards this year, most of them from Tuscon.
"To know that there's all these people out there praying for you and have you in their thoughts. And they're thinking about you and they want you to recover, it keeps her motivated," Kelly said.
And through many moments this weekend, this city is moving forward too,
even if there is one question about the tragedy that 11-year-old Kenneth Buchannan will never be able to answer: "Why would anybody do that?"