Space Delta 4, Detachment 1 change of command
Maj. William Cosgrove, Space Delta 4, Detachment 1 outgoing commander, passes the guidon to Col. Richard Bourquin, Space Delta 4 commander, during a change of command ceremony at Buckley Space Force Base, Colo., June 24, 2021. The passing of the guidon is a military tradition that symbolizes a transfer of command and commemorates past leadership and success of the outgoing commander. (U.S. Space Force photo by Airman 1st Class Haley N. Blevins)