PETERSON AIR FORCE BASE, Colo. – Depending on which country they’re from, the kids may ask about Father Christmas, Papa Noel, Saint Nick or Santa Claus. But they all want to know one thing: where in the world the jolly old man and his sleigh full of gifts are on Christmas Eve. Operation NORAD Tracks Santa has evolved from a misdirected telephone call in 1955, to a trailer parked outside the command’s former lair deep inside Cheyenne Mountain, to NORAD ’s modern-day headquarters at Colorado’s Peterson Air Force Base. And it takes a village of 1,500 volunteers to field emails and the 140,000 or so telephone calls to 1-877-HI-NORAD (1-877-446-6723). Volunteers are equipped with an Operations Center Playbook that helps ensure each and every caller can go to sleep happy and satisfied on Christmas Eve.