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

I have no idea. 40 years ago I knew 2 cowboys (competitive bull riders), and I visited them one afternoon. They were both so freaked out, and were drawing pics of what they saw hovering above them the night before. Huge, Disc shaped, lit up, right above their pickup truck. It followed them, and they were terrified. You cant make this stuff up.