SCHRIEVER AIR FORCE BASE, Colo. -- Members of the 19th Space Operations Squadron showed their holiday spirit by displaying 'GPS' in Christmas lights at their building during the month of December, 2017. 19 SOPS is a classic Reserve associate unit to 2 SOPS, 50th Space Wing, with a mission to perform launch, early-orbit, anomaly resolution and disposal operations for the Global Positioning System constellation. (U.S. Air Force photo/Senior Airman Laura Turner)