Quoted from Darcy:Most likely. The odds that we are alone in the universe is low. The problem arises with governments, do they let everyone else in the world know. If aliens landed on Earth like on the White House lawn would the worlds economy crash? Would it effect any current hostilities? An example is Ronald Regan stating at the U.N. (to paraphrase) "If outside the world forces arrived at, or confronted Earth, surely all nations should act together as one" He didn't state "Aliens".
American Officials never deny, or admit, to Aliens in the USA. A Russian Official says that there is a book with info on all Aliens in Russia. A Canadian Official has stated there are aliens here in North America.
Some people say that there are alien space stations on the dark side of the moon. NASA was told by them not to return there after the last Apollo Missions in the early 1970's.
please. the US government can't cover up a blowjob, let alone aliens visiting Earth.
the governments you mention are made up of lots and lots and lots of people, not all of them smart. some of them are crackpots. some of them believe in all kinds of silly things. many of them are incompetent. if proof existed ... we would know about it. trust me, i work with these people every day. they are no monolith.
Aliens telling us to GTFO is not the reason NASA never returned to the moon. It was simple politics (the only reason we went there in the first place). The panic that Sputnik inspired had faded, the cold war was cooling off with the SALT talks, the public was quite frankly bored with NASA and the moon, and real-world budgetary realities made the Apollo missions seem like a pointless vanity project -- one we couldn't afford in the midst of Vietnam, the Oil crisis, and runaway inflation. I know it's not as exciting as "ALIENS DID IT!", but it's the banal truth.