Brig. Gen. Andrew P. Armacost, Dean of the Faculty at the Air Force Academy, speaks to the cadets during the USAFA graduation ceremony in Colorado Springs, Colorado on Wednesday, May 23, 2018. Mattis is the 26th Secretary of Defense for the United States.

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Keywords: academy, air, america, andrew, archive, armed, army, defence, force, forces, graduation, lee, military, navy, reportage, service, serviceman, servicemen, sgt, soldier, staff, states, united, usa, usafa