New York City's vast underground network has become the unlikely focus of fresh alarm. Surveillance footage shared widely online shows teams of men lifting manhole covers in the middle of the night, descending into the sewers with flashlights, tools, and protective gear, then resurfacing hours later.Police have investigated multiple such episodes, particularly in Brooklyn, yet their public message remains the same: no known threat to safety.That reassurance has failed to settle nerves in a city still scarred by past attacks and struggling under years of unchecked migration and progressive governance.Mole people? Treasure hunters? Something else? Police are investigating a string...