DVHAA, also known as the Delaware Valley Historical Aircraft Association, is a nonprofit organization that preserves and displays the aviation history of the Delaware Valley. It includes members from the military and commercial sectors. The association has a research library that features books, technical documents, magazines, and still and motion pictures. Its gift shop offers toys, aviation models, clothing and decorative items. DVHAA s museum, established in 2000, exhibits more than 10 aircrafts and over 40 display cases. Additionally, its museum displays more than 200 handcrafted scale models, including panels, simulators, missiles and shells. Established in 1972, the association is located in Willow Grove, Pa.