Here’s the Tucson local news. They include a few additional details:

[…]
The Saturday morning shooting shocked the nation. It also brought worldwide attention to Giffords, who survived but resigned from Congress in January to focus on her recovery. Ron Barber, who also was shot, was elected to replace his boss in the House.

Several people at the event jumped into action soon after Loughner opened fire with his Glock.

Roger Salzgeber and Bill D. Badger, tackled Loughner.

Another bystander, Patricia Maisch, grabbed a gun magazine as Loughner tried to reload.

Joe Zamudio, who was out buying cigarettes, heard the gunfire, reached into his coat pocket for the 9-millimeter pistol he carried, clicking the safety off.

Zamudio had his finger on the trigger and seconds to decide what to do as he saw the struggle. He lifted his finger from the trigger and ran toward the struggling men.

A few feet away, Daniel Hernandez Jr., an intern for Giffords, applied pressure to her head wound and propped her up so Giffords wouldn’t choke on her own blood.

[…]