US Secretary of Defense James Mattis (C), US Marine General Joseph Dunford (L), Chairman of the Joint Chiefs of Staff, and David Norquist (R), Defense Department Comptroller, on the Defense Department budget are see at a House Appropriations Committee Defense Subcommittee hearing on Capitol Hill in Washington, DC, June 15, 2017. / AFP PHOTO / SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)