Naval Air Station Joint Reserve Base Willow Grove
From 1926 to 1942 Pitcairn used the airfield for design, construction and testing of a number of aircraft, including the Mailwing which was used by the United States Postal Service.[4] After the start of World War II, the United States purchased the property, under threat of eminent domain and launched a classified anti-submarine warfare program at the base.On February 29, 2008, the Commonwealth of Pennsylvania released a report detailing a plan for a joint interagency installation (JII), with a mission of national defense, homeland security and emergency preparedness.A handful of National Guard and Army Reserve soldiers remained, and the Air Force maintained administrative offices on the property.[10] In September 2015, the Horsham Land Redevelopment Authority worked on an "economic development conveyance" (EDC) application to acquire the base.