I have seen this video on documentaries about air traffic control and even September 11th. It is really amazing to watch the flights across the US and how many planes are in the air at any given time.
I fly a lot for work and I am always amazed at 3 things every time I fly. First of all, how the heck does a big bus of steel can get up in the air. Secondly it is amazing that these airplanes don’t run into each other in the air, or on the ground. And last, but not least, how the hell the airlines can keep things on time (oh forget that one).
This is a great video of all the airplanes flying around the US on any given day. The producer of this video went a step further and actually added some interesting graphics and comments.
It is worth the few minutes to watch. You can see more of this work at the Aaron Koblin website.