U.S. Space Force Col. Marc Brock, incoming Space Delta 2– Space Domain Awareness commander, addresses the audience during a change of command ceremony at Peterson Air Force Base, Colorado, June 14, 2021. Brock assumed command of the DEL 2 from Col. U.S. Space Force Col. Matthew Cantore, and is tasked with leading the critical mission of maintaining SDA. (U.S. Space Force photo by Senior Airman Andrew Bertain)