Wfm_x51_area51_warningsign

See: Nellis Air Force Base

aka: Groom Lake, Dreamland

Also:

Area 51 is the name of a first-person shooter arcade game in which the S.T.A.R. commando team goes in to a secret military base which has been overrun by evil homicidal aliens. When the player loses the game, the character–a young male commando–is shown turning into an alien zombie.

See also

Plan 9 from Outer Space