Maybe these craft are some secret government project. There is a lot of evidence indicating this which dates back to 1939. So why hasn’t the government made known this new revolutionary technology. Why, is because one of the other effects that the anti-gravity devices produce is massive amounts of electricity, hundreds of thousands of volts! This is known as “free energy.” This kind of electricity is broadcasted out and so does not need wires of any kind. This is why quite often when “UFOs” are seen in an area, all the appliances in a household magically come on.