Agent K (Tommy Lee Jones) is a member of the Men in Black (M.I.B.), a secret non-government agency that polices extraterrestrial aliens seeking refuge on Earth, living normal lives in disguise as humans around New York City. Operating from a base at a Triborough Bridge and Tunnel Authority ventilation station, they fund themselves using patents on alien technologies released to the public and maintain secrecy using neuralyzers to erase memories of alien sightings, also disguising aliens as humans and pets to maintain their secrecy, and that way they monitor currently 1500 aliens around the vicinity of New York. - Wikipedia.org