The first air-to-air refueling occurred between two DH 4s of the U.S. Army Air Service.
The event took place at Rockwell Field in San Diego. While the refueling was a success, an intended four day long duration did not occur.
President Harding was in Zion National Park, seeing some of the park by horseback.
Pope Pius XI condemned the French and Belgium occupation of the Ruhr, warning that it could lead to the "final ruin of Europe".
Arlington experimental farm.
