I've been in military and intelligence circles, who know that beneath the surface of what has been public knowledge, yes - we have been visited. Reading the papers recently, it's been happening quite a bit.
Source, in full
[dailymail.co.uk Apollo 14 astronaut claims aliens HAVE made contact - but it has been covered up for 60 years, Daily Mail UK, Story on Mitchell's Interview with Nick Margerisson for The Night Before on Kerrang! Radio, UK, (23 July 2008)