Men in black
In popular culture and UFO conspiracy theories, men in black (MIB) are allegedly government agents dressed in dark suits, who question, interrogate, harass, and threaten unidentified flying object (UFO) witnesses to keep them silent about what they have seen. The term is also frequently used to describe mysterious men working for unknown organizations, as well as various branches of government allegedly tasked with protecting government UFO secrets or performing other strange activities.