U.S. Airmen from the 909th Air Refueling Squadron execute a four-ship minimum interval take-off aboard KC-135 Stratotankers during exercise Steel Tiger at Kadena Air Base, Japan, Nov. 2, 2018. The KC-135s executed their entire pre-flight, taxi, takeoff, and departure without using any radio communications and coupled the procedure with minimum interval takeoffs between departures on a single runway. (U.S. Air Force video by SSgt Daniel E. Fernandez) More