Bill sent me a link to a very cool website which tracks commercial airline flights.
Each red dot is a plane flying over the USA.
The most interesting visual is the movie linked below.
Animation of all flight movements tracked by FlightAware during a 24-hour period in September, 2005.
You can search by Airport, Operator, air craft type or flight number.
Rick McCharles 
I love how day comes: the trans-Atlantic dots arrive on the east coast, and the red just starts moving west until the whole thing just GOES.