Lt. Col. Jason Heard, 492nd Fighter Squadron F-15E Strike Eagle pilot, maintains visual communication with ground crew prior to take-off during Agile Combat Employment training at Royal Air Force Lakenheath, United Kingdom, Jan. 12, 2021. Training incorporating ACE concepts contribute to the development of multi-capable Airmen and aircrew, improving interoperability and helping allies and partners increase their capabilities in less than optimal environments. (U.S. Air Force photo by Airman 1st Class Jessi Monte)