SCHRIEVER SPACE FORCE BASE, Colo. –
U.S. Air Force Maj. Gen. Christopher J. Niemi, USAF Warfare Center commander, left, and U.S. Space Force Col. Stephen Lyon, right, National Space Defense Center director and Space Delta 15 commander, pose for a photo during a visit to the NSDC at Schriever Space Force Base, Colo., April 11, 2025. Niemi requested to visit the NSDC to learn about any capability that enables continued employment of space-based communications and sensors. During the visit, Niemi received a mission brief, tour of the operations floor and an operations demonstration. (U.S. Space Force photo by Dalton Prejeant)