Two years after the shooting that left former Arizona congresswoman Gabrielle Giffords with a permanent brain injury, Giffords and her husband, retired astronaut Mark Kelly, sat down for an exclusive interview with "ABC World News" anchor Diane Sawyer.
The interview airs tonight on "World News with Diane Sawyer." In a behind-the-scenes chat with "Nightline" anchor Cynthia McFadden, Sawyer discussed her impressions of the couple.
"They continue to amaze me with their purposefulness and their resilience as the years- now two years have gone by to the day since she was shot, and how much they want to turn it into something that matters," Sawyer said.
See the full interview at 6:30 p.m. ET on "World News" and on "Nightline" at 12:35 a.m. ET
Giffords was shot in the head while meeting constituents at a Tucson, Ariz., supermarket on Jan. 8, 2011. In August 2012, Jared Lee Loughner pleaded guilty to the mass shooting that left six people dead and 13 injured, including Giffords.
In the wake of the Newtown, Conn., elementary school shooting, Giffords plans to lobby lawmakers about gun laws.
Kelly and Giffords - who both are gun owners - plan to meet with member of Congress to push for what they call a "consensus common-sense idea" which would include focusing on background checks to screen out the mentally ill and targeting big magazines that fire numerous rounds, Sawyer said.
"She going to be up there walking as best she can down those halls and sitting in the offices and saying, basically, 'look at me and tell me you're not going to do anything,'" Sawyer added.
The couple traveled to Newtown in the wake of the December shooting death of 20 children and six adults at the school.
Kelly found it tough.
"He tells us he sat down the family of a young girl who died and he said he just felt lost and he couldn't handle it …," Sawyer said, adding that when she asked Giffords about her reaction to the shooting, the former congresswoman replied: "Enough."
Sawyer said Giffords has made significant progress in her recovery but now has some frustration when the words don't come fast enough to convey what she's trying to say.
In addition to her brain injury, Giffords was left with a paralyzed right arm and partial blindness.