A group of men standing around each other. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
A black and white photo of three people standing on a sidewalk. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
Two men sitting at a table with papers. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.
Public domain photograph of the United States military and military-industrial complex before World War Two, 1930s, free to use, no copyright restrictions image - Picryl description