Public domain
US Army Engineering unit building a pontoon bridge at Washington Barracks, Washington, D.C.
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineUS Army Engineering unit building a pontoon bridge at Washington Barracks, Washington, D.C.. 1917-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.