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Photo by: Susan Walsh

President Obama greets the family of teacher Victoria Soto, who was killed in the Newtown school shooting, including her mother, Donna Soto (right), and brother Carlos Soto (center), after his speech at the University of Hartford in Hartford, Conn., on Monday, April 8, 2013. Mr. Obama said that lawmakers have an obligation to the children killed and other victims of gun violence to act on his proposals. (AP Photo/Susan Walsh)

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