Something that puzzles me...

These chemtrails do not seem to me to be any higher then normal clouds, and many times when I see them there are no other clouds around - so there is nothing to osbstruct my view, and yet, on the many occcassions when I have actually watched one being made...I have NEVER seen a plane. Just a condensed white streak appearing out of nowhere in the sky, looking more like something from a missle then a plane.