Hello Aangirfan, very pleased to see you embrace this story. The Hunt for Zero Point.http://vielewelten.at/pdf_en/the%20hunt%20for%20zero%20point.pdfThis is a great source on the subject of anti-gravity, it is written by Nick Cook who was an Aerospace journalist at Jane's Defense at the time. It is a history of the anti gravity program in the US and observes that the program seemed to achieve success in the late 1950s and then go-completely black,These were the triangles that hundreds saw in Belgium in around 1990. They were not aliens, they were real "secret team" aircraft. https://youtu.be/qpGc8w5Wu0YAll the people who saw it say stuff like "It couldn't belong to humans" but they have no idea actually what humans have and they are trained whenever they see a "spacecraft" to immediately imagine it is aliens from another planet, almost all the actual craft belong to the shadow government it seems, though there are a lot of other strange things.