Blimps were a common site at College Park's airshows. Here, the Wonderbread Blimp flies over a hangar and the balloon tower which housed a World War One-era hot air balloon used for weather reports.
A historical marker was erected by Prince George's County Historical Society in 1976. It lists some of the historic events which have taken place at the airport since 1909.
It has since been moved from its original position on Calvert Road to…