FAA Flight information is available to the public (I’m still trying to figure out how I can get that data). Aaron Koblin put together some pretty spiffy videos of this data. Each dot represents an airplane flying to or from the US.
![1.jpg](http://fly.blakecrosby.com/images/blog/1.jpg)
Be sure to check out the “overview documentation” (a video) on his website to understand how to interpret the data.
At first I thought it was a spider web!