I can see clearly now...

or at least I understand something a little better. The last few mornings have been foggy and the view from my balcony has been hazy.  I'm used to fog at ground level and have driven through some fairly dense patches and been confused sometimes when the weather man says something like "Visibility at the airport is less than two miles." It doesn't seem like I can see two miles when I can't even see the traffic light until I'm under it. But up here on my balcony where I can see for 10 miles (possibly 9 as the crow flies) on a clear day it becomes very obvious when I can only see for two miles. And on a tangent subject why "as the crow flies"? Why not the sparrow or the pigeon? What about an eagle or a hawk?  Why does a crow get all the credit for flying straight?  Do crows actually fly straight?  Maybe as the crow flies is a longer distance??? For that matter I can't remember the last time I actually saw a crow fly.  They're usually sitting clustered in trees making raucous noises. Perhaps I should do some research on this (when I'm fogged in for three days and have exhausted all other possible forms of entertainment).