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Associated Press
FILE - In this April 16, 2013, file photo, file photo, former Rep. Gabrielle Giffords, D-Ariz., and Rep. Ron Barber, left, D- Ariz., hold hands during the dedication of a room in the Capitol Visitors Center to slain congressional staffer Gabriel Zimmerman in Washington. As the race between Barber, who also was wounded in the 2011 shooting, and Republican Martha McSally has grown tighter in the final weeks before the Nov. 4, 2014, elections, Giffords is playing more of a role by appearing in ads and raising money for her former aide and increasingly turning the race into a debate about guns. (AP Photo/Jose Luis Magana, File)

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