Bells rang at 10:11 a.m., the moment a gunman opened fire on Giffords as she met with constituents two years ago. The city's mayor today rang a bell at a fire station, once for each of the victims.
Giffords and her husband today launched a political action committee aimed at curbing gun violence. They say their initiative will help raise money to support gun control efforts.
Also today, two politicians at the opposite ends of the gun debate held competing weapons-buy-back events outside a police station in Tucson. A city councilman asked people to turn in their guns for a $50 gift certificate from Safeway. That's the grocery store chain that owned the market that was the scene of the shooting.
In response, a Republican state senator who is a gun-rights advocate positioned himself outside the same police station and offered cash for guns. Several people waved signs and held up money to approaching drivers to announce that they were willing to buy their guns.