im from manchester england, and now a few times i have witnessed this black faint line that the plane seems to follow, when i asked about this in a certain forum, i was told it was part of project bluebeam and that the plane itself was a hologram. Im not overly confident this is truth, but without knowing myself what it was and why, it was something i tried to work with to research more about this, but found nothing to attach bluebeam with chemtrails. weird as it is but i have noticed these black lines a few times.. hopefully u will find out and i can keep my eye on this thread to see what outcomes turn up, as i would like to know what the hell it is.