With pictures of presidents, war, triumph and more, photographers have captured pivotal moments of our history and altered the country’s public consciousness. ‘Raising the Flag on Iwo Jima’ (1945). Joe Rosenthal/Associated Press Photographic images can inform, inspire, provoke and move us. They can change the course of history, give visible form to an abstract concept, and define our image of ourselves. Throughout American history, photography has done all these things.