NORAD is prepping to track Santa as he delivers presents to kids across the U.S. and the world. U.S. Air Force Lieutenant Colonel Drew Frey explains how they handle Christmas Eve. The command center has an entire workforce of 500 additional people on Christmas Eve to answer calls from children tracking Santa. Frey adds that NORAD has an entire system in place to keep track of Santa's travels and to ensure his safety — using Rudolph's nose as a signal for satellites. The Lt. Colonel notes "We've tried to crack the top secret code to figure out Santa's flight path, but it varies differently every year, depending on where all those good little girls and boys are.” The Santa tracker is up and running. You can check it out here or follow St. Nick’s travels with NORAD’s social media pages.