[SeeSac]

If it were a contrail, that shape is only possible from a center line thrust aircraft. Problem with that theory is there are no centerline thrust aircraft used in the flight profile being touted as the “answer”. Only acft like 747, 757, 767, airbus 3XX, etc.

How about this one?

[jimbo123]

Do you have video of the photo in #103?

[wrench]

Is this porported to be a Hi to AZ flight as well?

Do you have clear detailed pics showing the exhaust flame like the original video?

Post them and I will render an opinion. Your pic is of something 75 or more miles distant at an unknown time of year and unknown time of day. Atmospheric conditions change depending on season and time of day.