U.S. Space Force Col. Agustin “Rico” Carrero, incoming commander of Space Delta 11, right, accepts the Space Delta 11 guidon from Maj. Gen. Timothy Sejba, commander of Space Training and Readiness Command, left, during a change of command ceremony at Schriever Space Force Base, Colorado, June 10, 2025. The passing of the guidon symbolized Carrero’s formal assumption of command of the Delta. The ceremony marked a leadership transition for Space Delta 11, the Space Force’s range and aggressor unit responsible for delivering advanced training and threat replication in support of space warfighters. (U.S. Space Force photo by Isaac Blancas)