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Defense Secretary James N. Mattis and the vice chairman of the Joint Chiefs of Staff sit behind a desk.

Mattis Testimony

Defense Secretary James N. Mattis and Air Force Gen. Paul J. Selva, vice chairman of the Joint Chiefs of Staff, testify on the National Defense Strategy and the Nuclear Posture Review before the House Armed Services Committee in Washington, D.C., Feb. 6, 2018. DoD photo by Navy Petty Officer 1st Class Kathryn E. Holm

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