** FILE ** Former Rep. Gabrielle Giffords and her husband, former astronaut Mark Kelly, announced Tuesday they are launching the Americans for Responsible Solutions PAC, an advocacy group to fight gun violence. (Associated Press)

** FILE ** Former Rep. Gabrielle Giffords and her husband, former astronaut Mark Kelly, announced Tuesday they are launching the Americans for Responsible Solutions PAC, an advocacy group to fight gun violence. (Associated Press)