Public domain
Carlisle, Pennsylvania. U.S. Army medical field service school. Officer candidates during a practice road march carrying full packs disperse singly to side of road while being "attacked" by flour bombs
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineCarlisle, Pennsylvania. U.S. Army medical field service school. Officer candidates during a practice road march carrying full packs disperse singly to side of road while being "attacked" by flour bomb. 1943-01-01. Collins, Marjory. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.