Robert M. Gates, former Secretary of Defense, signs his new book “A Passion for Leadership” at the Marine Corps Exchange aboard Marine Corps Air Station Miramar, Calif., Feb. 1. Gates served as the 22nd Secretary of Defense from 2006 to 2011. ( Marine Corps photo by Cpl. Alissa Schuning/Released)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: app49, defense, gates, leadership, mcas, miramar, passion, robert, secretary, states, united