Again, I am sorry, but the ONLY way a beam of ANY LIGHT can be seen is if the air has some dust or other particulate matter in it. This has been demonstrated in every high school physics class and even by astronauts in space. Try it some clear night. Shine the laser up. You will see nothing, or if you do, you will only see a few sparkles from the beam reflecting off dust or pollen.
May the Force be with you.
An armed society is a polite society - Robert Heinlein
A Gun-Free-Zone is nothing more than a hunting preserve for wackos.