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How one grieving parent is taking on the gun lobby

Richard Martinez, whose son died one year ago in a campus shooting, explains why there should be "not one more."

Richard Martinez speaks about the loss of his son Christopher Michaels-Martinez, who was shot and killed during a shooting at the UC San Barbara, June 17, 2014 in Washington, DC. (Photo by Mark Wilson/Getty)
Richard Martinez speaks about the loss of his son Christopher Michaels-Martinez, who was shot and killed during a shooting at the UC San Barbara, June 17, 2014 in Washington, DC.Getty Images

Richard Martinez