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Defense-pact acronym (5 letter answer)
The answer NORAD is uncommon, appearing about once every 575 puzzles.
Command that "tracks" Santa
Org. that "tracks" Santa
Air Force arm: Abbr.
Can.-U.S. defense org.
Joint U.S./Canada military org.
Org. featured in 1983's "WarGames"
U.S.-Can. defense org.
U.S./Canada early warning syst.
Military group headquartered in Colo. Spgs.
Santa Claus-tracking org.
U.S.-Can. defensive air command