Like others here I have flown over that part of the world many times over the years, no doubt often leaving a trail. Nothing has changed that I know of in the last few years...maybe it's simply the case that you think you spotted something strange and are now spending more time looking at the trails than you were a few years back.
it seems nobody can give me the information I would like.
OK, what information would you like? From what I've can see you've been given plenty good factual objective information.
Capetonian
