Norad uses some pretty high tech stuff in it's North Warning System that tracks Santa on Christmas Eve. It's got radar that lets them know when he takes off from the North Pole and satellites that use infrared sensors to detect Rudolph's nose (the same satellites that track incoming missiles so lets hope they don't get them confused). It also uses cameras positioned around the world to keep a visual on Santa. These cameras are obviously top-secret because the only information Norad will give up is that they are "ultra-cool high-tech high speed digital cameras". Hmmm, Red prototypes maybe? He's already started his Christmas Eve run so go check out some video sightings.