Du think the U.S. and other governments r covering up alien visits from space. Is there a universal cover-up?

I know we are not alone people are just to ignorant and crazy to accept it.If the president just admitted some people would jump to conclusions of the would ending or something like that.That's a lot of waste of space if we are alone.I really don't know why they don't believe maybe they don't want to people are scared of new thing.But hay seeing is believing right