From The Sun's print editions:
Baltimore Sun reporter Candus Thomson offers this guest post:
It's time to track Santa's approach to the Greater Baltimore metro area. Doing the honors as it has every year since 1955 is NORAD, the North American Aerospace Defense Command, with help from private contributions.
It's worth every penny. According to the NORAD Santa website, the detection system consists of 47 radar installations, satellites with infrared sensors to detect the heat from Rudolph's red nose, high-speed Santa cams and chase planes.
To see all the ways you can follow along, Google: NORAD Tracks Santa.