I saw a documentary on Area 51 once. Naturally, I take these things with a grain of salt, but much of it was plausible. The point of the documentary was that it was a military facility for testing new airplanes, not the fabled alien autopsy laboratory. The strange lights often seen in the Nevada skies occurred during the time the military was testing the then-secret stealth fighter and stealth bomber. Non-secret air force planes use red and green lights, but I sincerely doubt they don’t have the next round of top secret air craft in the testing phase right now. Who knows what lighting is on top secret prototypes, or from what facilities they are testing them? If the Nevada desert seems largely uninhabited, how about the Pacific ocean?! That’s my guess. I believe it is possible (likely) that intelligent life exists elsewhere in the universe. That they have the technology to visit us is also possible, but slim. Much more likely, our government is just trying to stay one step ahead of the curve…