Mark Kelly leans on wife Gabby Giffords at a news conference in March 2013 in Tucson, site of the 2011 shooting in which six people died and Giffords was seriously wounded. The event was to push for stricter gun control. (Joshua Lott / Getty Images)
Gabby Giffords, with husband Mark Kelly, right, and Judiciary Committee Chairman Patrick Leahy, delivered an opening statement to the committee before a hearing on gun control in January in Washington. ( Chip Somodevilla / Getty Images)
In a 2012 election to fill the seat of former Rep. Gabrielle Giffords (D-Ariz.) Democratic candidate Ron Barber and Giffords celebrate a victory. Barber was shot in the cheek and the thigh in the 2011 shooting spree. (Ross D. Franklin / Associated Press)
Gabrielle Giffords and her husband, retired astronaut Mark Kelly, serve Thanksgiving dinner to troops at Davis-Monthan Air Force Base in Tucson in 2011. (Matt York / Associated Press)
Two days after she was shot in the head, a makeshift memorial was created outside the hospital where Gabby Giffords was in critical condition. (Shaun Tandon / AFP/Getty Images)
U.S. Rep. Gabby Giffords talks with constituents in an undated image prior to the Tucson shooting. (AFP/Getty Images)
