Park Record Media Center

Former Arizona Rep. Gabrielle Giffords, center, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, arrives on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, to speak before the Senate Judiciary Committee hearing on gun violence. From left are, the committee's ranking Republican, Sen. Charles Grassley, R-Iowa, Committee Chairman Sen. Patrick Leahy, D-Vt., Giffords, and her husband Mark Kelly . (AP Photo/Susan Walsh)

Former U.S. Rep. Gabrielle Giffords (C) gets a kiss from U.S. Senator Al Franken (D-MN) as Senator Patrick Leahy (L) (D-VT) and her husband, retired astronaut and Navy Captain Mark Kelly (R) look on during a hearing held by the Senate Judiciary committee about guns and violence on Capitol Hill in Washington, January 30, 2013. REUTERS/Larry Downing

Former Arizona Rep. Gabrielle Giffords, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, arrives on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, to speak before the Senate Judiciary Committee hearing on what lawmakers should do to curb gun violence in the wake of last month's shooting rampage at that killed 20 schoolchildren in Newtown, Conn. She is escorted by her husband, Mark Kelly, right, a retired astronaut, Committee Chairman Sen. Patrick J. Leahy, D-Vt., second from left, and the committee's Ranking Republican, Sen. Charles Grassley, R-Iowa, left. (AP Photo/J. Scott Applewhite)

Former Arizona Rep. Gabrielle Giffords, center, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, arrives with her husband Mark Kelly, right, on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, to give an opening statement before the Senate Judiciary Committee hearing on gun violence. Walking with Giffords is Senate Judiciary Committee Chairman Sen. Patrick Leahy, D-Vt., second from right, and the Committee's Ranking Republican, Sen. Chuck Grassley, R-Iowa. (AP Photo/Susan Walsh)

Former U.S. Rep. Gabrielle Giffords arrives with her husband, retired U.S Navy Captain Mark Kelly (R), prior to a Senate Judiciary Committee hearing on gun violence, on Capitol Hill in Washington January 30, 2013. The hearing comes six weeks after the massacre of 26 people at a Connecticut school ignited new calls to fight gun-related violence. Committee Chairman Patrick Leahy (D-VT) and Charles Grassley (R-IA) look on at left. REUTERS/Larry Downing

Committee ranking member Senator Chuck Grassley(L) R-IA and chairman Senator Patrick Leahy (2ndL) D-VT as they talk to shooting victim former Rep. Gabrielle Giffords (2R) and her husband retired Astronaut Mark Kelly, during a hearing of the Senate Judiciary Committee on Capitol Hill January 30, 2013 in Washington, DC. The committee held the hearing with Mark Kelly, Wayne LaPierre, Chief Executive Officer of the National Rifle Association, and others to testify about solutions to gun violence in the United States. BRENDAN SMIALOWSKI/AFP/Getty Images

Retired Astronaut Mark Kelly(R), husband of former Arizona Rep. Gabrielle Giffords(L), before she makes a statement during a hearing of the Senate Judiciary Committee on Capitol Hill January 30, 2013 in Washington, DC. The committee held the hearing with retired Astronaut Mark Kelly, husband of former Rep. Gabrielle Giffords, Wayne LaPierre, Chief Executive Officer of the National Rifle Association, and others to testify about solutions to gun violence in the United States. BRENDAN SMIALOWSKI/AFP/Getty Images

Former U.S. Rep. Gabrielle Giffords (L) is seated next to her husband, former U.S. Navy Captain Mark Kelly, (C) while news photographers take their pictures prior to a hearing held by the Senate Judiciary committee about guns and violence on Capitol Hill in Washington, January 30, 2013. REUTERS/Larry Downing

Former Arizona Rep. Gabrielle Giffords, second from right, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, sits with her husband Mark Kelly, right, on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, prior to giving an opening statement before the Senate Judiciary Committee hearing on gun violence. Supporters and opponents of stricter gun control measures face off at a hearing on what lawmakers should do to curb gun violence in the wake of last month's shooting rampage in Newtown, Conn., that killed 20 schoolchildren. (AP Photo/Susan Walsh)

Former U.S. Rep. Gabrielle Giffords sits with her husband, retired U.S Navy Captain Mark Kelly, prior to delivering a statement at a Senate Judiciary Committee hearing on gun violence, on Capitol Hill in Washington January 30, 2013. The hearing comes six weeks after the massacre of 26 people at a Connecticut school ignited new calls to fight gun-related violence. REUTERS/Kevin Lamarque

Former Arizona Rep. Gabrielle Giffords, speaks during a hearing of the Senate Judiciary Committee on Capitol Hill January 30, 2013 in Washington, DC. The committee held the hearing with retired Astronaut Mark Kelly, husband of former Rep. Gabrielle Giffords, Wayne LaPierre, Chief Executive Officer of the National Rifle Association, and others to testify about solutions to gun violence in the United States. BRENDAN SMIALOWSKI/AFP/Getty Images

Former Arizona Rep. Gabrielle Giffords, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, sits with her husband Mark Kelly, speaks on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, before the Senate Judiciary Committee hearing on gun violence. (AP Photo/Susan Walsh)

Former Arizona Rep. Gabrielle Giffords, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, sits with her husband Mark Kelly, on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, and gives an opening statement before the Senate Judiciary Committee hearing on gun violence. Supporters and opponents of stricter gun control measures face off at a hearing on what lawmakers should do to curb gun violence in the wake of last month's shooting rampage in Newtown, Ct., that killed 20 schoolchildren. (AP Photo/Susan Walsh)

Retired Astronaut Mark Kelly, husband of former Rep. Gabrielle Giffords, listens as his wife shooting victim, former Rep. Gabrielle Giffords,as she makes a statement during a hearing of the Senate Judiciary Committee on Capitol Hill January 30, 2013 in Washington, DC. The committee held the hearing with Mark Kelly, Wayne LaPierre, Chief Executive Officer of the National Rifle Association, and others to testify about solutions to gin violence in the United States. BRENDAN SMIALOWSKI/AFP/Getty Images

Former U.S. Rep. Gabrielle Giffords delivers her statement during a hearing held by the Senate Judiciary committee about guns and violence on Capitol Hill in Washington, January 30, 2013. REUTERS/Larry Downing