UFOs are regularly picked up by our air defenses. In google video or youtube, there are multiple camera angles from the last few decades of very fast objects flying or pausing there. With as many cameras in as many hands as we have these days, it's not even that big of a deal anymore. UFOs are very much real. But, it seems they just like to watch and have probably been doing it for millions of years.
You guys ever see the one infared NASA angle of an object going 1000 mph and making a complete 90 degree right angle turn without slowing? Freaking awesome!