Men in Black (M.I.B.) is a secret non-government agency that polices and monitors extraterrestrial activity on Earth. The agency operates from an underground base at a Triborough Bridge and Tunnel Authority ventilation station in Battery Park, New York City. MIB members use neuralyzers to erase witnesses' memories of alien sightings. The MIB is monitoring about 1500 aliens around the world, most of them in the vicinity of New York City.