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This image taken from security cameras and released
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This image taken from security cameras and released by the FBI, shows Washington Navy Yard shooter Aaron Alexis moving through the hallways of Building #197 carrying the Remington 870 shotgun. (Sept. 16, 2013)(Credit: Getty Images)

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Images of the Navy Yard shooter

The FBI released surveillance video and images of Navy Yard shooter Aaron Alexis. Alexis did not target individuals when he opened fire, the FBI said.