Unless you've been living under a rock you most likely have seen or heard of the Men In Black movie with Will Smith and Tommy Lee Jones. What most people do not realize is that the stories of the Men in Black have been documented and have been part of the UFO phenomena as long as Area 151 itself.
The accounts are all similar, of mysterious men wearing black suits while traveling in two in black Cadillacs. Their mission seems to intercept people who have witnessed UFO sightings or participated in alien encounters. The Men in Black were reported to have pale skin, unusual eyes (sometimes glowing) and an unworldly presents. Witnesses have reported to have lost hours of memory after encountering these strange beings. Seems, similar to the movie, after these 'beings' arrive they interview the witness, confiscate any evidence and then flash the witness with a blinding light to erase all memory of their 'alien' encounter. Some people believe these travelers are from a secret branch of the government, others believe they are human/alien hybrids sent by the aliens themselves to cover their tracks.