SCHRIEVER AIR FORCE BASE, Colo. -- Army Gen. Mark Milley, chairman of the Joint Chiefs of Staff, leaves a message for Joint Task Force-Space Defense members during his visit to the organization March 1, 2021, at Schriever Air Force Base, Colo. Milley met with U.S. Space Command and Space Operations Command leaders to learn more about the organizations’ missions. (U.S. Space Force photo by Kathryn Damon)

U.S. Army Gen. James Dickinson, U.S. Space Command commander, and U.S. Space Force Lt. Gen. Stephen Whiting, Space Operations Command commander, host Army Gen. Mark Milley, chairman of the Joint Chiefs of Staff, on March 21, 2012, at Schriever Air Force Base, Colorado. USSPACECOM and SpOC leaders provided the 20th CJCS an overview of their respective mission areas during the visit. (U.S. Space Force photo by Dennis Rogers)

U.S. Space Command and Space Operations Command leaders hosted U.S. Army Gen. Mark Milley, the 20th chairman of the Joint Chiefs of Staff, on March 1, 2021, at the National Space Defense Center at Schriever Air Force Base, Colorado. They discussed the combatant command’s and the field command’s missions while on the floor that executes the Joint Task Force-Space Defense’s protect-and-defend mission. Pictured, from left, are Chief Master Sgt. Jacob Simmons, Joint Task Force-Space Defense command senior enlisted leader; Brig. Gen. Tom James, JTF-SD commander; Lt. Gen. Stephen Whiting, Space Operations Command commander; Lt. Gen. John Shaw, USSPACECOM deputy commander; Milley; Gen. James Dickinson, USSPACECOM commander; Master Gunnery Sgt. Scott Stalker, USSPACECOM CSEL; and Brig. Gen. Chris Povak, JTF-SD deputy commander (U.S. Space Force photo by Kathryn Damon)