Dr. Mark T. Esper was the 27th secretary of Defense and 23rd secretary of the Army, and author of the NYT bestselling memoir "A Sacred Oath: Memoirs Of A Secretary Of Defense During Extraordinary Times."
Dr. Mark T. Esper was the 27th secretary of Defense and 23rd secretary of the Army, and author of the NYT bestselling memoir "A Sacred Oath: Memoirs Of A Secretary Of Defense During Extraordinary Times."