Stripes in the sky

Busy at work - not many different things happening, it is all starting to seem the same, day after day. But no reason to stay away, sorry.
Somebody was discussing the passing of planes, and the patterns they make in the sky. Here in Vegas we are under some major east-west paths, from LA to most of the east coast. I remember flying into LA from New York, and if the pilot was talkative and discussing where we were flying there usually was a mention of the Grand Canyon off to the South. So I guess in the past I used to be parts of these stripes too.