![](https://www.historynet.com/wp-content/uploads/1996/09/Airmail-polo960_640.jpg)
One of the airmail Jennys lands on the makeshift airfield at the Polo Grounds of Potomac Park in Washington D.C. (Library of Congress)
One of the airmail Jennys lands on the makeshift airfield at the Polo Grounds of Potomac Park in Washington D.C. (Library of Congress)