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Arizona Daily Star, Rick Wiley) MANDATORY CREDIT, Associated Press
People gaze at a small memorial plaque on a rock at the Safeway market on Saturday, Jan. 7, 2012, to commemorate the victims of the mass shooting on Jan. 8, 2011, in Tucson, Ariz. The one-year anniversary of the shooting of Rep. Gabrielle Giffords in the parking lot of the grocery store is Sunday. Arizona is marking the event with a series of events, including community-wide bell-ringing at the moment of the attack, speeches on behalf of the victims, and an evening candlelight vigil that Giffords will attend.

TUCSON, Ariz. — Rep. Gabrielle Giffords and other survivors of a deadly shooting rampage in Tucson, Ariz., are gathering to reflect and remember.

Church bells are set to ring at 10:11 a.m. Sunday, the exact time that a deranged gunman shot Giffords in the head and mowed down a line of people waiting to talk to her outside a grocery store.

Six people were killed, including a 9-year-old girl born on 9/11 and a federal judge. Thirteen others were shot, including the congresswoman.

Giffords, who has undergone a year of grueling therapy, plans to appear at an evening candlelight vigil. An interfaith service is also planned.

Jared Lee Loughner has pleaded not guilty to 49 charges in the shooting. He is being forcibly medicated in prison in a bid to make him mentally fit for trial.