U.S. Secretary of Defense Jim Mattis (L) speaks with members of his delegation prior to a meeting at NATO headquarters in Brussels on February 15, 2017. 
NATO allies meet new US Defence Secretary James Mattis for the first time in Brussels seeking reassurance over President Donald Trump's commitment but bracing for military spending demands. / AFP / POOL / Virginia Mayo        (Photo credit should read VIRGINIA MAYO/AFP/Getty Images)
VIRGINIA MAYO/AFP/AFP/Getty Images
U.S. Secretary of Defense Jim Mattis (L) speaks with members of his delegation prior to a meeting at NATO headquarters in Brussels on February 15, 2017. NATO allies meet new US Defence Secretary James Mattis for the first time in Brussels seeking reassurance over President Donald Trump's commitment but bracing for military spending demands. / AFP / POOL / Virginia Mayo (Photo credit should read VIRGINIA MAYO/AFP/Getty Images)
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