An eyewitness to the January 8, 2011, shooting of Rep. Gabrielle Giffords and 13 others recounts the tragedy as it unfolded. In the assassination attempt, the gunman, later identified as Jared L. Loughner, shot Rep. Giffords in the head and killed six others in a group gathered for a town hall-style event outside a supermarket in Tucson, Arizona.