"Shooting: Gabrielle Giffords constituent meeting in a Tucson, Arizona, parking lot Date: Jan. 8, 2011 Perpetrator: Jared Lee Loughner Gun: Glock 19 9 mm semiautomatic handgun. Loughner killed six people and shot 13 more, including Rep. Giffords. How he got it: Arizona, which has some of the laxest gun laws in the country, passed a law in 2010 that allowed people to buy guns for concealed carry without a permit. Though guns cannot be sold to people with severe mental illness and though Loughner was suspended from his community college for mental health issues, no court had ever declared him mentally unfit, so his on-the-spot background check at a gun outlet came up clear."