I saw an invisible helicopterI always look upward to the sky to see ufo’s ( and I do see them often, but don’t usually report them. We often see/hear police or TV helicopters in this area I saw some red lights in a row and heard a helicopter but I did not see anything behind the lights. I ran inside to grab the binoculars and ran back outside and the helicopter (or whatever it was), was invisible. I live in a metro area and there is usually an outline of something! I ran to the other side of the house and still could not see anything except the row of red lights and could hear the loudness. Even if it was jet black, would’t I have been able to see an outline? I got online to read about invisible helicopters, but could not find much.PS. I see a lot of daytime sightings and will try to get better at reporting them.