Mark Kelly, husband of former Arizona Rep. Gabrielle Giffords, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, testifies on Capitol

 

              Mark Kelly, husband of former Arizona Rep. Gabrielle Giffords, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, testifies on Capitol
Mark Kelly, husband of former Arizona Rep. Gabrielle Giffords, who was seriously injured in the mass shooting that killed six people in Tucson, Ariz. two years ago, testifies on Capitol Hill in Washington, Wednesday, Jan. 30, 2013, 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)