India, Dec. 25 -- It is Christmas Eve, and all kids can think about is Santa Claus and their presents. Well, the good thing is NORAD's Santa has already left the North Pole and is on his way to your city, delivering presents. You can also track St Nick's journey across the skies.

For nearly 70 years, the North American Aerospace Defense Command (NORAD), the joint US-Canadian military group responsible for aerospace warning and defense, has followed Santa's route each December 24. What began as a mishap in 1955, when a misprinted Sears ad accidentally directed children to a military phone line, evolved into a beloved annual tradition powered today by volunteers, phones, apps, and an interactive website.

As of Wednesday morning, Santa had...