CNNHillary Clinton gets choked up discussing gun controlCNN(CNN) Hillary Clinton grew emotional on the campaign trail Monday while introducing a mother whose child was killed during the Sandy Hook Elementary School shooting. Clinton got choked up while bringing on to the stage Nicole Hockley, the mother of ...Mother of Sandy Hook victim speaks at Clinton town hallCBS NewsNearly three years after Sandy Hook, US endures 142 more school shootingsRealVailDear Roseburg, Shooting doesn't define you.