Whats’ the biggest threat to national security — climate change, as President Obama said in his State of the Union Address — or the $18 trillion national debt, as Admiral Mike Mullen said several years ago?
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Defense Secretary Ashton Carter was reluctant to pick one of the above, in responding to a question posed by Rep. Jackie Walorski (R-Ind.) at a hearing of the House Armed Service Committee on Wednesday.

But the secretary of defense, in trying to respond, did say that U.S. strength depends on “instruments of national power (other) than military power.”