Army Command Sgt. Maj. John Wayne Troxell, senior enlisted advisor to the chairman of the Joint Chiefs of Staff, third from left, hosts a Pentagon news conference on the emerging warfighting domains of space and cyber, Dec. 9, 2019. Air Force Chief Master Sgt. Roger Towberman, U.S. Space Command senior enlisted leader; Marine Corps Master Gunnery Sgt. Scott Stalker, U.S. Cyber Command senior enlisted leader; and Air Force Chief Master Sgt. Patrick F. McMahon, U.S. Strategic Command senior enlisted leader; joined Troxell to speak as part of the annual Defense Senior Enlisted Leader Council.