Democratic Leader Nancy Pelosi and the House Democratic Steering and Policy Committee are holding a hearing titled “Gun Violence Prevention: A Call to Action.”

Here are the panelists who will testify:

-- Michael A. Nutter, Mayor, City of Philadelphia
-- Scott Knight, Chief of Police, City of Chaska, Minnesota and Former Chair of the International Association of Chiefs of Police (IACP) Firearms Committee
-- Ms. Emily Nottingham, Mother of Gabe Zimmerman
-- Dr. Janet Robinson, Superintendent of Schools, Newtown, Connecticut