Defense Secretary James N. Mattis, center, along with David L. Norquist, right, Defense Department comptroller and chief financial officer, and Marine Corps Gen. Joe Dunford, left, chairman of the Joint Chiefs of Staff, testify on the DoD posture and fiscal year 2019 budget before the Senate Armed Services Committee, Washington, D.C., April 26, 2018. DoD photo by Navy Petty Officer 1st Class Kathryn E. Holm