what would an investor buy to gamble on a NATO-Russia war

Recently retired NATO general Richard Shirreff, who was Deputy Supreme Allied Commander Europe (DSACEUR) until 2014, has warned about the possibility of a NATO-Russia war in 2017. The trouble, in his scenario, would start in the Baltic area.
If an investor (let's call him Beelzebub) wanted to gamble on this possibility, what would he buy now?
Think nuclear winter.
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Harold Davis

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