Not only do American military satellites have to put up with the constant threat of ultrasonic space droppings, now they must also suffer the prying lenses of a couple of Frenchmen. Thierry Legault and Emmanuel Rietsch have spent the past two years turning consumer-grade components into a system that can keep up with the zippy and supposedly secret movements of craft like the X-37B space plane and the NROL-49 low-Earth orbit spy sat. Hit the source link and you'll see videos of the International Space Station, which th