We’ve entered a moment in geopolitics that forces us to look up from the spreadsheets and planning calendars. The U.S. and Russia—two of the world’s major nuclear players—are once again trading warnings, and the implications are profound for global security, business risk and strategic policy.
What’s happening:
President Trump announced that the U.S. may resume nuclear-weapons testing “on an equal basis” with other nations. 
President Putin responded by instructing his government to prepare proposals for resuming its own nuclear tests if the U.S. does so.