Deadly shooting at Colorado theater

4 of 36: People observe a moment of silence with President Barack Obama for the victims of the Aurora, Colo., shooting at an event at the Harborside Event Center in Ft. Myers, Fla., Friday, July 20, 2012. Obama, who was scheduled to spend the day campaigning in Florida, cancelled his campaign events to return to Washington to monitor the shooting. (AP Photo/Susan Walsh) (AP Photo/ Susan Walsh)

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