FILE - In this March 16, 2017, file photo, NATO's Supreme Allied Commander Europe, Army Gen. Curtis Scaparrotti arrives for a meeting in Vilnius, Lithuania. The deep chill in U.S.-Russian relations is stirring concern in some quarters that Washington and Moscow are in danger of stumbling into an armed confrontation that, by mistake or miscalculation, could lead to nuclear war. “During the Cold War, we understood each other’s signals. We talked,” says Scaparrotti, who is about to retire. “I’m concerned that we don’t know them as well today.” (AP Photo/Mindaugas Kulbis, File)
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