While you're sipping on hot cider today, Santa Claus is busy trying to meet a tight time frame. Luckily, you can follow the fat man's journey with the NORAD Santa Tracker 2009.
The Web site, available by clicking on the link on this page, tracks Santa during his international travels.
It relies on radar, satellites, Santa cams and fighter jets.
The site notes, "The moment that radar indicates Santa has lifted off, we use our second detection system. Satellites positioned in geo-synchronous orbit at 22,300 miles from the Earth’s surface are equipped with infrared sensors, which enable them to detect heat. Amazingly, Rudolph's bright red nose gives off an infrared signature, which allow our satellites to detect Rudolph and Santa."
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Don't worry: Santa has already started his journey, but obviously he hasn't yet made it to the U.S.