Putin told reporters, “We are essentially witnessing the breakdown of the international arms control order and (the start of) an arms race. It’s very hard to imagine how the situation will develop (if the United States quits the INF treaty). If these missiles appear in Europe what should we do? Of course, we’ll have to ensure our own security.”

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https://www.reuters.com/article/us-russia-putin-nuclear/russias-putin-accuses-u-s-of-raising-risk-of-nuclear-war-idUSKCN1OJ11R