U.S. Marine Corps SgtMaj. Troy E. Black, Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff, signs the National Space Defense Center heritage board during a visit to the organization at Schriever Space Force Base, Colo., Dec. 19, 2023. Black visited the NSDC to meet with joint enlisted servicemembers as part of a larger familiarization tour of space organizations across the Front Range (U.S. Space Force photo by Tiana Williams)

U.S. Marine Corps SgtMaj. Troy E. Black, right, Senior Enlisted Advisor to the Chairman of the Joint Chiefs of Staff, listens to a briefing by U.S. Space Force Chief Master Sgt. Jacob Simmons, left, U.S. Space Command senior enlisted leader during a visit to the NSDC at Schriever Space Force Base, Colo., Dec. 19, 2023. Black visited the NSDC to meet with joint enlisted servicemembers as part of a larger familiarization tour of space organizations across the Front Range (U.S. Space Force photo by Tiana Williams)