Rep. Gabrielle Giffords led a crowd in the Pledge of Allegiance, her words ringing out across a cold Tucson night in a rare public appearance at a candlelight vigil at the University of Arizona.
Photo of the day: Giffords leads crowd in Pledge of Allegiance
Mark Kelly holds his wife, Rep. Gabrielle Giffords on the UA Mall on Sunday during a vigil marking the anniversary of the shooting that left six dead.

