UFOs are not only visited by the United States. This time, potential aliens considered the Polish city of Lublin as their presence. It happened on April 17th and was filmed.
On it, you can personally see how a UFO flies over a wind farm, and then how one of the propellers stops due to the fact that the UFO is in close proximity to it. This type of UFO is very well known to NASA, because it was because of it that the shuttle Atlantis could not land. Then 3 or more similar UFOs flew so close to him that the landing was delayed for 24 hours.
An eyewitness also says that the object originally flew from the east, and was over the power plant for about an hour. Interestingly, he flew away immediately after the eyewitness finished filming him. This gives reason to believe that the flight was intended to deliberately attract attention to itself. In this case, I would like to hope that this is not a harbinger of a future war, but just a demonstration of alien technologies to the Earth. And, if we are dealing with the second option, it would be extremely interesting to meet with the inventors of this ship and exchange experiences.