He heard yelling, and one voice broke through.

"Congresswoman Giffords has been shot! Over here!"

We were all made quite aware of the results of the January 8th shooting in Tucson, AZ but what exactly happened that Saturday?. Stuart Rodeffer, Tucson battalion chief, explains the events of the chaotic tragedy.

Compagno ran to her. She was alive. He stood in the cramped walkway in front of the store and scanned the ground. He did the numbers. Four dead for sure. Seven people needed immediate attention. A little girl on the ground.

He heard another voice, from someone else in the crew.

"How many helicopters?"

"Launch all of them," Compagno said.

Read the full events at usatoday.com