11/16/2011 - The 821st Air Base Group held its holiday tree lighting Nov. 11 in front of the headquarters building. The event roughly coincides with the beginning of the dark season at Thule; the base won’t see sunshine again until February. Thule Air Base, located about 750 miles north of the Arctic Circle, is one of six installations operated by the 21st Space Wing. (U.S. Air Force photo/Senior Airman Zhenhua Xie)