From left to right: Air Force Capt. John Diaz, Capt. Jason Whitehead, background, and Maj. John Troja, foreground, fly a KC-135 Stratotanker aircraft during a refueling mission over Iraq, Dec. 1, 2016. Diaz, Whitehead and Troja are pilots assigned to the 340th Expeditionary Air Refueling Squadron. Air Force photo by Senior Airman Jordan Castelan