Giffords to Attend Vigil on Anniversary of Ariz. Shooting

Ariz. rep will be at candlelight ceremony to honor victims of Tucson attack.

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Arizona Rep. Gabrielle Giffords will be attending a candlelight vigil Sunday, marking the one-year anniversary of an attack where 18 people were shot outside of a Tucson grocery store while Giffords greeted her constituents.

The vigil, which is designed to honor the six people killed in the shooting, will feature Giffords's husband, former astronaut Mark Kelly, as one of the speakers.

[See a photo gallery of the Gabrielle Giffords' Shooting in Tucson.]

On Jan. 8, 2011, Giffords was shot in the head in the parking lot of a Safeway grocery store while hosting a constituent meet-and-greet. The Arizona Democrat was severely wounded, and has spent the last year overcoming brain damage, regaining her ability to walk and talk.

While rehabilitating, Giffords's husband tells CBS News that she has been in constant contact with her Arizona and Washington, D.C. offices and left a recorded message in the fall for her constituents saying she "wants to get back to work."

[Read Washington Whispers: GOP Official Quits Over Obama Zombie Image]

As Giffords continues her rehab, questions have been raised about whether she will run for re-election. Kelly tells CBS Giffords will make a decision by May on whether or not she will seek office.

A number of events, including Sunday's vigil at the University of Arizona, will honor those killed in the shooting. Friday, a special session will be held in the U.S. District Court of Arizona in the memory of U.S. District Judge John M. Roll. Saturday, a memorial hike will be held in Tucson for Gabe Zimmerman, a congressional aide of Giffords that was also killed.