The honorable Dr. Mark Esper, Secretary of Defense, visits the National Space Defense Center Aug. 20, 2020, at Schriever Air Force Base, Colorado. While visiting the NSDC operations floor, Esper learned about the unit’s mission and coined Airmen for outstanding performance. U.S. Space Command’s Joint Task Force - Space Defense executes it’s protect and defend mission through various operations centers, including the NSDC. (U.S. Air Force photo by Kathryn Damon)