Whether you believe extraterrestrial intelligent life exists or not, you have to admit that there's an allure about the idea. There's some truth to that poster on Fox Mulder's wall in The X-Files, the one that says "I want to believe."
But it's one thing to say that there's other intelligent life out there in the universe, and another thing entirely to say that that life has visited us and the government has been keeping it secret for decades. And yet, that's exactly what a lot of folks believe has been happening out at Area 51 in the Nevada desert.