There are a number of immediate steps that the U.S. and the Russians could take to de-escalate the current tensions. First, taking nuclear weapons off their hair-trigger status, which would immediately reduce the possibility of accidental nuclear war. That could be followed by a pledge of "no first use" of nuclear weapons.
If this does not happen, it will almost certainly result in an accelerated nuclear arms race. "I don't know how this is all going to end," Putin told the St. Petersburg delegates. "What I do know is that we will need to defend ourselves."
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