This weather phenomena is something that might be of interest to this thread: https://earthsky.org/earth/best-photos-beautiful-lenticular-clouds-around-the-worl

This weather phenomena is something that might be of interest to this thread: https://earthsky.org/earth/best-photos-beautiful-lenticular-clouds-around-the-world/ https://earthsky.org/earth/best-photos-beautiful-lenticular-... But I think more than that it's important to be aware that many contractors and govts. conduct tests that aren't public or even inter-agency knowledge. Projects are need to know, even for people with the highest clearances.