I saw a video on facebook recently of some sort of devices making circles in the clouds, revealing the blue sky above. I thought at first this was fake but apparently not. Someone provided the explanation using the above terms...cloud cropping and plureite sensors, but I can no longer find the original post and I can't find anything online. The plureite sensors were the devices apparently making the circles and cropping the cloud as some way of controlling the weather. Has anyone ever heard of this?