United States Army Engineer Research and Development Laboratory

The Engineer Research and Development Laboratory (ERDL) was a United States Army Corps of Engineers research facility located at Fort Belvoir, Virginia. The ERDL performed research and development related to earthmoving, industrial engines and turbines, fuels handling, environmental control, electric power and propulsion, direct energy sources, detectors, bridges and marine craft, mine warfare, fortifications and obstacles, camouflage and deception, water purification, nuclear weapons effects, materials, and environmental testing.

Source: Wikipedia — United States Army Engineer Research and Development Laboratory (CC BY-SA 4.0)