There was a formula that we learned in theoretical physics, that this guy made, that calculates the number of planets in the universe that have intelligent life. It's based on a number of factors that you must determine. It's called the Drake Equation.
http://en.wikipedia.org/wiki/Drake_equation
I'm a firm believer that we are not alone in the universe, but weather or not the government is trying to cover up a UFO here i doubt it. Thats just me. Call me crazy if you want.
Personally i can't stand the conspiracy theorists. We had a girl in our class who was dead serious when she said that "911 was planned by Bush for an excuse to go to war with Iraq for the oil."
Such an insult to the memories of those lost on that tragic day.
Any way i don't need to start a debate about what happened on 911.
The Drake Equation is kind of fun to mess around if you have a calculator on hand.