12th Space Warning Squadron welcomes new commander

Col. Devin Pepper, 21st Operations Group commander, hands the 12th Space Warning Squadron guidon Lt. Col. Carl Bottolfson at a change of command ceremony, June 8, 2017, at Thule Air Base, Greenland. The 12th SWS provides critical, real-time warning of ballistic missile attacks against North America and detects, tracks and identifies earth-orbiting objects in support of U.S. Strategic Command's space control mission. (Courtesy Photo)

Col. Devin Pepper, 21st Operations Group commander, hands the 12th Space Warning Squadron guidon to Lt. Col. Carl Bottolfson at a change of command ceremony, June 8, 2017, at Thule Air Base, Greenland. The 12th SWS provides critical, real-time warning of ballistic missile attacks against North America and detects, tracks and identifies earth-orbiting objects in support of U.S. Strategic Command's space control mission. (Courtesy Photo)

THULE AIR BASE, Greenland --