ABC News’ Christiane Amanpour is heading to Tucson, Arizona, scene of the mass shooting today at an event put on by Rep. Gabrielle Giffords (D-AZ). Amanpour will anchor “This Week” from the scene of the shooting where Giffords was speaking at a gathering of constituents in her district. Giffords remains in critical condition after she was shot once in the head. Eleven others were shot during the event outside a Safeway grocery story. Five people died including Federal Judge John Roll and a child believed to be 9 years old.