RQ-4 Global Hawk
An Airman pulls a set of chalks while escorting a RQ-4 Global Hawk back to a hangar during ground operations at an undisclosed location in Southwest Asia Sept. 18, 2015. The Global Hawk block 20 aircraft carry the Battlefield Airborne Communication Node payload, which ensures connectivity for warfighters. The BACN system, managed out of Hanscom Air Force Base, Mass., recently achieved 100,000 combat flight hours. (U.S. Air Force photo/Tech. Sgt. Christopher Boitz)