Gen. David L. Goldfein, Chief of Staff of the Air Force, speaks with pilots from the 15th Wing and the Hawaii Air National Guard’s 154th Wing on Joint Base Pearl Harbor-Hickam, Hawaii, July 12, 2016. Earlier in the day, Goldfein officiated the Pacific Air Forces assumption-of-command ceremony designating Gen. Terrence J. O'Shaughnessy as the commander of PACAF. (U.S. Air Force photo by Tech. Sgt. Aaron Oelrich)