Tucson rampage casts light on toxic political tone

People gather for a candlelight vigil for the victims of the shooting in Arizona, at the steps of Capitol Hill in Washington, on Saturday, Jan. 8, 2011. Rep. Gabrielle Giffords, of Arizona, was shot in the head Saturday by a gunman who opened fire outside a grocery store during a meeting with voters, killing a federal judge and four others in a rampage. (AP Photo/Jose Luis Magana)

January 8, 2011 7:06:23 PM PST
Politicians of all stripes are bound to be haunted by Rep. Gabrielle Giffords' warning, 10 months before she was shot, to cool the rhetoric.