A medical helicopter evacuates victims from a ‘Congress on Your Corner’ event in Tucson, Arizona, where U.S. Representative Gabrielle Giffords and others were shot and seriously wounded.

First responders evacuate a victim from the scene of Giffords’ shooting.

A sign hangs from a shopping center at a ‘Congress on Your Corner’ event in Tucson, Arizona.

A Policeman with a police dog are pictured at the crime scene outside the Safeway store in North Tucson where Congresswomen Gabrielle Giffordswas shot.

Police and fireman stand outside the Safeway store in North Tucson, AZ.