A temporary airfield was set up on the polo field in Potomac Park for a US Army air mail service from Washington to New York via Philadelphia starting in May 1918. In August 1918 the Post Office took over the service and moved the Washington terminus to an airfield in College Park, Maryland. Photo from: National Archives at College Park, Maryland
This photo was added on 13 July 2022, and has since been viewed 168 times.