This animation is absolutely mind boggling! It's hard to imagine so many aircraft in the air during the day over the U.S. Watch the progression start from east to west in the morning. If you have Quicktime on your computer, click on 'watch animation' under the top picture for watching the clearest views in the first link.http://www.aaronkoblin.com/work/flightpatterns/Here's the youtube version, but it's not as clear as the one in Aaron Koblin's site.http://www.youtube.com/watch?v=FCEM-ZcB14AKim

interesting link! thanks.-andy crosby