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to world peace and let no one doubt this is a difficult and dangerous effort on which we have set out. neil: 60 years ago this very month, we were on the brink, the closest the world had ever come to nuclear war. thereby a few other decision it could have been. now were facing potentially the same predicament, what president biden calls potential armageddon given some of the retaliatory efforts and provocative moves on the part of vladamir putin talking freely about using tactical nucl...

Indications they are preparing to use them. >> reporter: neil, russia a big advantage in these tactical warheads and those dropped in japans are ranging and russias nukes are bigger, neil. their military doctrine is escalate to de-especially indicate la a situation -- deescalate a situation and using tactical nukes early. the low yield nukes can launch from fighter jets short range and missiles and caliber cruise missiles and same type of missiles that russia is firing into ukraine. the u.s. has...