(ABCNEWS.GO) — Arizona Congresswoman Gabrielle Giffords will step down from the House this week and not seek re-election when her current term expires this year, she announced today.

Giffords has made a stunning recovery after being shot in the head when a gunman opened fire while the Arizona congresswoman was meeting with constituents at a suburban Arizona supermarket in January 2011. But she said in the video today that she needs to focus on her rehabilitation.

“I have more work to do on my recovery and so to do what is best for Arizona I will step down this week,” Giffords, speaking clearly but slowly and haltingly, said in a video posted online Sunday. “Thank you for your prayers and for giving me time to recover.”

Before leaving office, Giffords will complete the “Congress On Your Corner” event that was interrupted last January when 22-year-old gunman Jared Loughner opened fire, killing six and wounding twelve.

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