Letter to Secretary of Defense Chuck Hagel ArticleMarch 5, 2013 Letter to Secretary of Defense Chuck Hagel Five former deputy secretaries of defense write to Secretary of Defense Chuck Hagel on the need for a bottom-up review of military spending. Mar 5, 2013 John M. Deutch, John P. White, John J. Hamre, 2 More Rudy deLeon, William J. Lynn III