Volunteers pick up NORAD Tracks Santa souvenirs at the NORAD Tracks Santa Operations Center at Peterson AFB, Colo on Dec. 24. More than 1,200 volunteers answer phone calls and emails in seven different languages from children around the globe asking about Santa on this day. The North American Aerospace Defense Command is a bi-national command of U.S. and Canada responsible for aerospace warning and control and maritime warning in North America.