Colorado lawmakers advance gun control bills - Article Photos 2/11

Mark Kelly, husband of former U.S. Rep. Gabrielle Giffords, testifies in favor of proposed gun control legislation in the Colorado Legislature, at the State Capitol, in Denver, Monday March 4, 2013. Kelly, a retired Navy captain and astronaut, has testified before Congress in support of gun control measures. The proposal Kelly testified for would expand background checks to include private and online sales. (AP Photo/Brennan Linsley)