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Former congresswoman Gabrielle Giffords says she will skydive Wednesday to mark the third anniversary of the mass shooting at her campaign event that took the lives of six people.

Giffords, one of 13 people wounded in the massacre, was shot in the head and has undergone intensive physical therapy. On Wednesday, she retweeted a tweet from NBC's Savannah Guthrie: "Today: Gabby Giffords will mark 3rd anniversary of #Tucson shootings by skydiving here in AZ."