Chem Trails

I mentioned "chem trails", also known as "con (condensation) trails" in one of my comments.
Here is an article discussing them.  Living within 40 miles from the largest Naval Air Station in the world, we used to see them a lot, but not as much as I did 20 years ago.
http://en.wikipedia.org/wiki/Chemtrail_conspiracy_theory

Credit:  this picture is from the Wilipedia article above.
There were mornings in the late 1980's I could hardly count the number of con-trails in the sky near my house!