modern research facility located on in Adelphi, Maryland. It also had a test range at Blossom Point, Maryland, a U.S. Army installation near La Plata, Maryland, and research facilities at Woodbridge, Virginia. The Woodbridge site was closed in the 1990s, after the Army decided to stop electromagnetic pulse testing there. In 1989, the commander of the HDL said that the decision to stop this testing was mainly based on the Army's need to perform more powerful testing, something not appropriate for the thickly settled neighborhood around the site. In 1997, the became the Occoquan Bay National Wildlife Refuge. References Further reading External links College recruiting advertisement, October 18, 1966, Daily Collegian, University of Pennsylvania Closed research facilities of the United States Army Historic American Engineering Record in Maryland Laboratories in the United States National Institute of Standards and Technology Science and technology in Maryland