A new perspective on the old... http://www.youtube.com/watch?v=kSqYk6yD75I And this one... http://www.youtube.com/watch?v=gEDD-86BD-0 Density Of Asteroids in the Orbital Plane of the Solar System (very cool visualization) http://www.youtube.com/watch?v=ZJpPjsdlTnw So how important is planetary defense anyway? Regards, Eric