Airmen from Hawk Aircraft Maintenance Unit welcome RQ-4 Global Hawk aircraft 2019 after its 10,000 flying hour milestone flight at an undisclosed location in Southwest Asia Mar. 8, 2015. Block 20s were initially fielded with imagery intelligence (IMINT)-only capabilities. Three Block 20s have been converted to an EQ-4 communication relay configuration, carrying the Battlefield Airborne Communication Node (BACN) payload. (U.S. Air Force photo/Tech. Sgt. Marie Brown)