U.S. Marines with Marine Aviation Support Squadron 2 conduct training with their new Aviation Command and Control Subsystem while aboard Marine Corps Air Station Futenma, Okinawa, Japan, Sept. 19, 2019. MASS-2’s new AC2S is the next step in modernizing the unit's equipment and improving interoperability with the Marine air communication squadrons, joint agencies, and Theater Air Ground Systems. (U.S. Marine Corps photo by Lance Cpl. Ethan M. LeBlanc)