Defense Secretary Ash Carter, second from right, and Air Force Secretary Deborah Lee James, right, stand for a photo with Air Force Chief of Staff Gen. Mark A. Welsh III, left, and Air Force Vice Chief of Staff Gen. David L. Goldfein, third from left, at the Pentagon, April 29, 2016. Defense leaders gathered for an event at the Pentagon to congratulate Goldfein on his nomination as the next Air Force chief of staff. DoD photo by Army Sgt. 1st Class Clydell Kinchen