Dorothea Lange’s Pledge of Allegiance. I actually have used it for years in a presentation I do. https://anchoreditions.com/dorothea-lange-prints/pledge-of-allegiance-san-francisco-1942 By coincidence it’s the same photographer @janbb mentioned.
Also, WARNING the below can be triggering for some people. I won’t even link the photo I have in my mind. It is in relation to 9/11.
Photos of people falling after they jumped from the tower on 9/11 haunt me. I forget about it until someone says something to make me think of it, which luckily is very rarely. There have been efforts to remove those photos and I think most news outlets stopped showing the video.