You know just last month a errant artillery shell being tested at Picatinny Arsenal in North Jersey veered off course and landed in a home over a mile from the launch site.
The Army still tests fires live experimental rounds in NJ on a regular basis.
The Picatinny Arsenal had a HUGE explosion way back (WWII I suppose or before) that scattered live shells over a huge area. They put a fence around it all and declared it off-limits - problem solved! I always wondered about what trophy deer might be found back in there!?
when they began vacuuming sand up off shore and then pumping it onto Sea Bright they redefined the concept of sea shells
the army had been firing shells out into the ocean for years just where they began to gather sand and when they pumped the sand from onto the shore hundreds of shells were planed on the beach
the project was delayed and some very nervous people with metal detectors spent a couple of months planting little flags on the new sand then they were supposedly all dug up. The shells likely came from the batteries out on Sandy Hook which have been there since the revolutionary war
.