Do you think aliens in ufos have visited Earth? (And all things UFO)

I think I may have mentioned this earlier. I was good friends with a guy named Kevin "Mako" Day while in the Navy. We were both Air Intercept Controllers and even attended Top Gun Ground School together. If he says he saw something, I believe him, I know him, he is a very intelligent man and knew his job much better than I did. Anyway, Showtime is doing a documentary....