I dont. I just believe that God makes human a little better these days...
I believe there is a possibility that there is life of some kind on some other planet or planets, but I don't believe we've made contact of any sort and probably never will.
I believe they must be out there somewhere (the universe is unbelievably enormous, after all), but not necessarily that they've been here.
...crickets chirping in the background. Would I help if I told you that to err is human?
I believe that the probability of alien life somewhere out there in the universe is incredibly high but I accept that at the moment we have no actual evidence to back it up. I don't believe there is any credible evidence to suggest any alien life has ever made it to our planet.
Military aircraft and/or weapons testing.
It's a testing and training facility.
What about them? People 'see' strange things all the time in all sorts of places. It means nothing. A ufo is only something that those people can't readily identify. It's doesn't automatically mean the only explanation must then be an extra terrestrial one.