My best friend from Florida came to visit me here in Tennessee so she could take fall leaves back for the children in her Montessori pre-school.  In our quest to find the most beautiful leaves, we headed for the Blue Ridge Parkway, well known for its stunning scenery.  No sooner had we gotten on the parkway than we found ourselves in the midst of one of the worst fogs I ever experienced.  We could literally only see about three feet in front of the car.  I was struck by was how similar it...