On Jan. 8, 22-year-old Jared Loughner opened fire in a rally held at a supermarket in Tucson, Ariz. He killed six people, including a federal judge and a 9-year-old girl. Among the 12 injured was U.S. Congresswoman Gabrielle Giffords, who remains in critical condition. Giffords was the intended target. What do you think can be learned from the tragedy in Arizona last week?