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To: JonPreston

I lived in Great Falls for 4 years while in the USAF. I have seen contrails form on the runway as our planes took off. It happens when it is very cold and Montana can get VERY cold.

18 posted on 02/04/2023 6:48:53 AM PST by pfflier

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To: pfflier

Did you watch the video?

20 posted on 02/04/2023 7:10:14 AM PST by JonPreston

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