Witness the power of photographs and films to teach and communicate in the twenty-minute video Witness from the Essential Lens series. Photographs bear witness to the world around us and give us an opportunity to learn more about historical and present day people, places, and events. Middle school teacher Donald Rose conducts an activity from the Change and Resistance collection. Documentary film producer Ken Burns shares how he weaves photographs into historical narratives to bring the past to life. Photojournalist Louie Palu talks about what it takes and what it means to document war.