In the middle of the barren Nevada desert, there's a dusty unmarked road that leads to the front gate of Area 51. It's protected by little more than a chain link fence, a boom gate, and intimidating trespassing signs. One would think that America's much mythicized top secret military base would be under closer guard, but make no mistake. They are watching.

Beyond the gate, cameras see every angle. On the distant hilltop, there's a white pickup truck with a tinted windshield peering down on everything below. Locals says the base knows every desert tortoise and jackrabbit that hops the fence. Others claim there are embedded sensors in the approaching road.What exactly goes on inside of Area 51 has led to decades of wild speculation. There are, of course, the alien conspiracies that galactic visitors are tucked away somewhere inside. One of the more colorful rumors insists the infamous 1947 Roswell crash was actually a Soviet aircraft piloted by mutated midgets and the wreckage remains on the grounds of Area 51. Some even believe that the U.S. government filmed the 1969 moon landing in one of the base's hangars.

For all the myths and legends, what's true is that Area 51 is real and still very active. There may not be aliens or a moon landing movie set inside those fences, but something is going on and only a select few are privy to what's happening further down that closely-monitored wind-swept Nevada road. "The forbidden aspect of Area 51 is what makes people want to know what's there," says aerospace historian and author Peter Merlin who's been researching Area 51 for more than three decades.

"And there sure is still a lot going on there."he beginning of Area 51 is directly related to the development of the U-2 reconnaissance aircraft. After World War II, the Soviet Union lowered the Iron Curtain around themselves and the rest of the Eastern bloc, creating a near intelligence blackout to the rest of the world. When the Soviets backed North Korea's invasion of South Korea in June 1950, it became increasingly clear that the Kremlin would aggressively expand its influence. America worried about the USSR's technology, intentions, and ability to launch a surprise attack—only a decade removed from the Japanese attack on Pearl Harbor. Known by its map designation as Area 51, this middle-of-nowhere site became a new top-secret military base. To convince workers to come, Kelly Johnson, one of the leading engineers of the U-2 project, gave it a more enticing name: Paradise Ranch.

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