## UAP/UFO Research & Development: The Field-Envelope Technology Trail I've been looking at publicly available U.S. government R&D records for technologies that could relate to a specific UAP engineering hypothesis: **Not a conventional propulsion system, but a vehicle surrounded by a controlled electromagnetic, plasma, quantum, or spacetime field.** There is no public evidence that the U.S. has built such a vehicle. However, there is a documented collection of government research addressing...