“I took my high power laser pointer and shot it up in the direction of the unexplained loud jet sound. … On two separate occasions, I have seen the beam interrupted momentarily —  It seems to me there is a real physical object moving through the air that is simply not visible.”

— Scientist in San Diego, California, who has heard loud jet noises in clear sky and two times flashed a powerful laser in direction of unexplained jet noise and saw the beam interrupted by something invisible

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