WASHINGTON -- Thousands of shoes were laid outside the Capitol in Washington, D.C., on Tuesday to represent children who have been killed by gun violence.
CBS affiliate WUSA reports that the group based the protest on research from the American Academy of Pediatrics that found approximately 1,300 children are killed by guns each year, or about three every day.
The Parkers were among the dozens of volunteers at the Capitol calling on Congress to take action.
Lori Haas also spoke of her painful memories Tuesday.
Haas' daughter survived the massacre, and since the shooting, Lori has called on Congress to take action.