Gabrielle Giffords Shooting: The Missed Warning Signs
A 2009 Homeland Security study warned that the rise of right-wing extremism could spur violent attacks. But the report was attacked by Republicans, including now-Speaker John Boehner, blunting its impact.
Jared Lee Loughner appeared in federal court on charges he tried to assassinate Rep. Gabrielle Giffords in a shooting rampage that left six people dead. (AP Photo)
