They didn't see it because first of all.. its an inside job like 9/11 (they knew where the planes were heading, just like the balloons), and second of all, they've have cylindrical looking cloaking tech that covers the balloons sinc ebefore the Philadelphia experiment days. Also, there's no space security force to pick up on it, because space doesn't exist, and all the so called satellites are really just balloons, and always have been. Sometimes the solar panels get covered in crud and quit producing enough helium and energy to cloak, and so they call it a "UFO" if we happen to see it. This time is different though, they are purposefully using the uncloaked balloons to stage a false flag event.