well yes it's possible to catch these birds in the act. in fact it was several months ago when i found a website, from canada i believe, that had actual photos of actual jets actually spraying in the sky. i posted it on syzygy. within the day, the site was taken down. it had the best close-ups i've seen in nearly 8 years now. you could actually see the spraying nozzles. i dont know if you can go back in the archives far enough to find the original post and then my followup post where i had tried to get on the website and was denied. others went there and found it had been removed from the web.