From left, British Royal Air Force Chief of the Air Staff, Air Chief Marshall Sir Andrew Pulford, Chief of Staff of the U.S. Air Force Gen. Mark A. Welsh III, French air force Deputy Chief of the Air Staff Gen. Antoine Creux pose for a photo during the Trilateral Exercise at Langley Air Force Base, Va., Dec. 15, 2015. As part of the exercise, Pulford, Welsh, and Creux hosted a press conference to discuss the importance of working together as coalition forces. (U.S. Air Force photo by Tech. Sgt. Katie Gar Ward)