In 2008, the Borough of Palmyra cleared more than 300 unexploded ordnances at the former Palmrya Drive-In. In November, the Borough resumed its search for unexploded bombs , the Burlington County Times reports.

Borough officials learned that the U.S. Army used the former drive-in site as a testing range for a top secret weapons program in the 1940s, and set about cleaning it up, according to the report. The site is part of a 189-acre brownfield on Route 73, between the Palmyra Cove Nature Park and Pennsauken Creek. The Borough has been attempting to clean up and redevelop that area.

It is using part of a $2.2 million grant from the New Jersey Department of Environmental Protection to conduct the search, according to the report. Officials believe there may be a large number of explosives in the area.