In this April 21, 2011, file photo, Gen. James Cartwright takes part in a news conference at the Pentagon. A former commander of U.S. nuclear forces is leading a call for taking U.S. and Russian nuclear missiles off high alert, arguing that a longer fuse could keep a possible cyberattack from starting a nuclear war and would mean less risk of miscalculation in a crisis. (AP Photo/Alex Brandon, File)
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