Chopper 4 Footage Shows Site Where Sea Mine Was Found

Two to three blocks of a Brooklyn neighborhood were evacuated Friday as authorities investigated a report of possible explosives — a sea mine, in fact — found in the water. Sea mines are self-contained explosive devices put in water to destroy submarines or large surface ships. Like land mines, they’re left wherever they’re deposited until they’re triggered by a vessel that touches or, in some cases, approaches it.