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In this video I used a clear triangle ruler on the photograph that I took of a UFO.
On the clear triangle ruler I show that this UFO was descending on a straight line.
See that the top cloud from which this UFO broke away is still on almost the same position.
The UFO with its five flashing circle has descended more than 200 mm away from where it broke away. This is clear evidence to me that what we are seen here is not a contrail.
Contrails do not do that it just vaporized away.