Dan Gross, president of the Brady Campaign to Prevent Gun Violence, calls on Congress to address gun violence at a news conference on Capitol Hill on Tuesday. More than 20 family members and victims of mass shootings across America joined him.

Photo by Joshua Roberts

Above: Dan Gross, president of the Brady Campaign to Prevent Gun Violence, calls on Congress to address gun violence at a news conference on Capitol Hill on Tuesday. More than 20 family members and victims of mass shootings across America joined him.

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